Help With Math

Using the quadratic formula to solve equations.

-12^2 + 12 x-9 = -7x^2
10x^2 + 5x + 12 = 0
6x^2 + 12x = - 1
11x^2 - 7x -1 = 0
2x^2 -18x + 16 = 0

Can u show work to help me out

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  1. I will do one .

    11x^2-7x-1=0
    a= 11
    b=-7
    c=-1

    x= (-b+-sqrt(b^2-4ac)/2a

    Put the numbers in, and solve.

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    bobpursley
  2. = 7 +or- isqroot 5/22

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