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How do you find the root of the equation by completing the square y2 plus 8y-9 equals 0?
y^2+8y-9=0
Add the constant 9 to both sides.
y^2+8y=9
Take half of the linear coefficient 8, square it and add it to both sides.
y^2+8y+16=9+16
Now factor the left side and simplify the right side
(y+4)^2=25
Square root both sides.
y+4=+/-5
y=-4+5 or -4-5
y=1 or -9
check your answers.1 works -9 works in the original equation.
What else can I help you with?
What is the first step in solving this equation by completing the square?
The first step would be to find the equation that you are trying to solve!
To find the roots of 2xx-5x plus 1 equals 0 by bisection method?
I'm not familiar with the "bisection method" to find the roots of 2x2-5x+1 = 0 but by completing the square or using the quadratic equation formula you'll find that the solution is: x = (5 + or - the square root of 17) over 4 Hope that helps.
How do you find the square number to an answer Ie 2 equals 250?
It is not quite clear where a square number fits into the [false] equation 2 = 250
What is 2x2 - 12x - 54 equals o find x?
2x2-12x-54 = 0 Solve by factoring or using the quadratic equation formula or by completing the square: (2x+6)(x-9) = 0 Therefore: x = -3 or x = 9
What is the solution to 4 equals 2b plus b squared?
To find the solution to this equation, you need to rearrange the terms and solve for the variable. 4 = 2b + b^2 can be rewritten as b^2 + 2b - 4 = 0. You can then solve this quadratic equation by factoring, completing the square, or using the quadratic formula.
What is the completing the square method?
Completing the square is a technique used to find the zeros/solutions to a polynomial equation; ex) x2 + 2x = 15. To complete the square, one must have a trinomial square on one side of the equation. To do so, add 1 to each side of the previous equation. x2 + 2x + 1 = 16. This will allow you to factor the first side of the equation so that you can take the square root of both sides. (x + 1)(x+1) = 16 => (x + 1)2 = 16. Take the square root of both sides: x + 1 = ± 4. Thus x = -3, 5
How do you find the number of amps in the equation E equals Pt?
Energy E= Pt = I2Rt give I= square -root(E/Rt)
How do you find the vertex of the parabola y equals -4x2 - 16x - 11?
You would convert it to vertex form by completing the square. You can also find the optimum value as optimum value and vertex are the same.
What is the value of x in the equation xsquare equals 49?
x2 = 49 Square root both sides to find the value of x:- x = 7
How does square root work?
The idea is to find a number which, when square, equals the given number. For example, asking for the square root of 100 means solving the equation x2 = 100. The solution, in this case, is 10. (Minus 10 is also a solution, but the term "square root" refers to the positive solution in this case.)The idea is to find a number which, when square, equals the given number. For example, asking for the square root of 100 means solving the equation x2 = 100. The solution, in this case, is 10. (Minus 10 is also a solution, but the term "square root" refers to the positive solution in this case.)The idea is to find a number which, when square, equals the given number. For example, asking for the square root of 100 means solving the equation x2 = 100. The solution, in this case, is 10. (Minus 10 is also a solution, but the term "square root" refers to the positive solution in this case.)The idea is to find a number which, when square, equals the given number. For example, asking for the square root of 100 means solving the equation x2 = 100. The solution, in this case, is 10. (Minus 10 is also a solution, but the term "square root" refers to the positive solution in this case.)
Find the radius for a circle with the equation x2 plus y2 equals 9?
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
How do you find the value of 'a' in simplest radical form in the equation 'a square roots of 2 equals 18'?
You're going to want to multiply the square root of 2 by itself to get rid of it. Then you're left with x times 2 equals 18. a = 9√2
