# math

x^2=8x-9
solve by completing the square to obtain exact solutions

1. 👍
2. 👎
3. 👁
1. x^2 - 8x + .... = -9 + ....
x^2 - 8x + 16 = -9 + 16
(x-4)^2 = 7
x-4 ± √7
x = 4 ± √7

1. 👍
2. 👎

## Similar Questions

1. ### Algebra

1.Solve the system of equations. y = 2x^2 - 3 y = 3x - 1 a. no solution b. (-1/2, 5), (2, -5/2) c. (-1/2, -5/2), (2,5) d. (1/2, 5/2), (2, 5) 2.how many real number solutions does the equation have 0 = -3x^2 + x - 4 a. 0 b. 1 c. 2

2. ### Math check please

1. Solve the system of equations y=2x^2-3 y=3x-1 a)no solution b)(-1/2,5),(2,-5/2) c)(-1/2,-5/2),(2,5)**** d)(1/2,5/2),(2,5) 2. How many real number solutions are there to the equation 0=-3x^2+x-4? a)0 ***** b)1 c)2 d)3 3.solve

3. ### Algebra

Which of the following statements is true? A. Any quadratic equation can be solved by completing the square. B. Completing the square always gives two distinct solutions. C. You can’t complete the square if there is no constant

4. ### Math

solve the equation by completing the square round to da nearest hundred if nessesary. x^2 + 10x = 18 A -11.56, 1.56 B 11.56, 1.56 C -11.56, - 1.56 my answer D 11.56, -1.56 solve the equation by completing the square x^2 + 9x -14 =

1. ### Algebra

Solve by completing the square: x^2+3x-28=0

2. ### Algebra 1 Answer Evaluation

Solve x^2 -6x - 13 = 0 by completing the square. Give exact solutions. A: x = ±√22 (or) x = ±4.69

3. ### math

Solve the equation by completing the square. If the solutions are real, give exact and approximate answers. Otherwise, list the exact solutions. 12x=-3x^2-14 Please help!!!!! :(

4. ### Algebra

Solve the equation by completing the square. x² – 7x – 4 = 0 • 7.53, –0.53 • –7.53, –0.53 • –7.53, 0.53 • 7.53, 0.53

1. ### Math

Solve by completing the square x^2+4x-21=0 Help how do I do this???

2. ### mathematics

solve m2+6m+7 using completing the square method

3. ### Algebra

x^2=7x+12=0 Solve the following quadratic equation by completing the square. Simplify the solutions and rationalize denominators, if necessary.

4. ### Algebra II

1)What method(s) would you choose to solve the equation: x2 + 2x - 6 = 0 A. Square roots; there is no x-term. B. Quadratic formula, graphing; the equation cannot be factored easily since the numbers are large. C. Factoring; the