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Is there an appropriate method for working out quadratic equations When you use the double brackets is there a way other than guesswork?
Wiki User
∙ 12y ago
Yes, of course! Mathematicians do not guess!
Let me give an example:
x2 + x - 2 = 0 (This is really simple and we can see before we start that x will equal 1 and -2 )
This factors to:
(x + 2) (x -1) = 0
We can now solve the roots by first making the first bracket equal to 0.
i.e. x + 2 = 0
x = -2
Then by making the second bracket equal to 0.
x - 1 = 0
x = 1
Proof indeed that the roots are 1 & -2.
Alternatively we can use the quadratic formula (you can search for this on the internet or in a maths book) to calculate the values of x.
Wiki User
∙ 12y ago
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How do you solve equations with brackets?
Follow PEMDAS (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction), but do what is in the brackets first.
How do you make math equations in word?
you probably can, apart from the brackets and curvy x
Where can the foil method be used?
When multiplying out the brackets in a quadratic equation or expression: f = first o = outer i = inner l = last
How do you solve x2 6x equals 0?
factorise it into brackets. The equation is actually x2-6x+0. So into brackets it will be (x-6)(x+0) = 0. From here, to solve the equation, make either of the brackets = 0 by substituting a value for x. In this instance x = 0 or 6.
How do you answer by expanding brackets?
Answering and algebraic equation by expanding what's in the brackets is also called factoring. Factoring perfect square trinomials or other types of equations are done differently, but I'll show you a basic example. 1. First multiply all the terms in the second set of brackets by the first term in the fist brackets. So y x y and y x -3 which will give you y (y+6)(y-3)
How do you solve linear equations with bracets?
You simplify the brackets first and then you will have linear equations without brackets!
What are the symbols used in quadratic equations?
Addition, subtraction signs, brackets, squares and powers, square roots and roots, fractions. Random variables are also used, like x.
How do you solve equations with brackets?
Follow PEMDAS (Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction), but do what is in the brackets first.
How do you determine quadratic eqauation given the roots?
If for example the roots where x = 2 or x =5 then within the brackets this would be (x-2)(x-5) = 0 and by multiplying out the brackets the quadratic equation comes to x2-7x+10 = 0
How do you make math equations in word?
you probably can, apart from the brackets and curvy x
What are Parentheses or brackets in math?
They're the curved symbols found on the 8 & 9 keys on the keyboard. Their purpose is to isolate parts of equations, and signify their elevated importance. In mathematical equations, anything enclosed in brackets is solved first.
What would be the sign in front of the plain num if you are about to factor a quadratic equations involving some x2's some x's and a plain number you see that the sign in front of the x's is negative?
If the sign in front of the plain number is positive, that means that both of your brackets will have minus signs.
What are grouping symbols called?
There are a couple types of grouping symbols used in math. These are mainly parentheses and brackets. Both plain and curly brackets are used in some equations.
Where can the foil method be used?
When multiplying out the brackets in a quadratic equation or expression: f = first o = outer i = inner l = last
What is BEDMAS?
BEDMAS is a way to remember order of operations in math it stands for brackets,equations,division,multiplication,addition,and subtraction.
How do you solve x2 6x equals 0?
factorise it into brackets. The equation is actually x2-6x+0. So into brackets it will be (x-6)(x+0) = 0. From here, to solve the equation, make either of the brackets = 0 by substituting a value for x. In this instance x = 0 or 6.
You are about to factor a quadratic equation involving some x-s some xs and a front of the plain number is positive this tells you that when you find the two brackets of factors?
The positive number tells you that the brackets will be both pluses or both minuses.
