If that's x2 times 20 = 0, then x = 0, because only 0 x 20 = 0
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Solve this problem -x squared -40x- 80 =0
4, -5
x^2 -x - 20 = 0(x + 4)(x - 5) = 0x + 4 = 0 or x - 5 = 0x = -4 or x = 5
x2 + 6x + 8 = 0 Solve for x.X = -2 or X = -4
x * x - 9 = 0 PEMDAS = Multiplication first. What multiplied it self equals nine? 3. So x = 3