Math

Solve each equation by completing the square.

-36x=8x^2+28

-8x^2-3x=-5

5x^2-x-6=0

6x^2-24x-30=0

7x^2+8x-12=0

-10x^2 -9x+1=0

5x^2-x=4

-11x^2-8x=-7x-10

-3 1/3x^2+ 10x -27 1/2= -231/3

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  1. #7) 5x^2-x=4 is x=1

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  2. 36x = 8x^2 +28
    8 x^2 -36x +28 = 0
    x^2- (9/2)x + 7/2 = 0
    (x - 9/4)^2 +7/2 - 81/16 = 0
    (x - 9/4)^2 = (81-56)/16 = 25/16
    x - 9/4 = + or - 5/4
    x = 1 or 7/2

    I'll be glad to check your work on the other ones

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