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If your equation is in the form ax2 + bx + c, it can always be solved for x by using the quadratic formula.
x = -b plus or minus the square root of (b2 - 4ac) with the whole thing divided by 2a
Let's try an easy example: x2 + 3x - 4 = 0
That's factorable: (x + 4)(x - 1) so we already know what the answers are (-4, 1)
Now let's plug in the quadratic formula where a = 1, b = 3, c = -4
x = -3 plus or minus the square root of (3)2 -(4)1(-4) divided by 2(1)
Simplified, that's -3 plus or minus the square root of 25 divided by 2
Our two answers are (-3 + 5) divided by 2 and (-3 - 5) divided by 2
2/2 = 1 and -8/2 = -4
Non-factorable equations work just as well, except the answer won't be a whole number. It'll be some nasty decimal or an imaginary number.
What else can I help you with?
How do you solve these equations?
Tell me the equations first.
How do you solve multivariable equations?
You need as many equations as you have variables.
How do you solve 3 dimensional equations?
You can solve the system of equations with three variables using the substitute method, or using matrix operations.
Why do you need to be able to solve equations?
If you don't learn to solve equations then guess and check is the only way to arrive at new information.
Solve linear equations with complex coefficients on both sides?
You would solve them in exactly the same way as you would solve linear equations with real coefficients. Whether you use substitution or elimination for pairs of equations, or matrix algebra for systems of equations depends on your requirements. But the methods remain the same.
How do you solve 9- 2 equations?
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How do you solve these equations?
Tell me the equations first.
Does this web site solve equations?
There are people who use this web site that can and will solve equations.
How can you use a graph to solve systems of equations?
You can use a graph to solve systems of equations by plotting the two equations to see where they intersect
How do you solve trigonometric equations?
The answer depends on the nature of the equations.
How do you solve equations with fraction?
You solve equations with fractions the same way you solve other equations. You perform various arithmetic operations on both sides of the equals sign until you get the result you want.
How do you solve multivariable equations?
You need as many equations as you have variables.
How we solve equations of motion by graph?
One can solve equations of motion by graph by taking readings of the point of interception.
What are the disadvantages to using equations?
Its harder to solve the equations with grande numbers
How do you solve two-step equations with fractions?
Equations can be tricky, and solving two step equations is an important step beyond solving equations in one step. Solving two-step equations will help introduce students to solving equations in multiple steps, a skill necessary in Algebra I and II. To solve these types of equations, we use additive and multiplicative inverses to isolate and solve for the variable. Solving Two Step Equations Involving Fractions This video explains how to solve two step equations involving fractions.
How can you solve a system of equations?
The answer depends on whether they are linear, non-linear, differential or other types of equations.
Solve the following system of equations using sustitution x6y-4 x-2y 28?
To solve a system of equations, you need equations (number phrases with equal signs).
