(x^2+x-20)(8x^2-10x-7)=0

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Solution for (x^2+x-20)(8x^2-10x-7)=0 equation: 


Simplifying
(x2 + x + -20)(8x2 + -10x + -7) = 0

Reorder the terms:
(-20 + x + x2)(8x2 + -10x + -7) = 0

Reorder the terms:
(-20 + x + x2)(-7 + -10x + 8x2) = 0

Multiply (-20 + x + x2) * (-7 + -10x + 8x2)
(-20(-7 + -10x + 8x2) + x(-7 + -10x + 8x2) + x2(-7 + -10x + 8x2)) = 0
((-7 * -20 + -10x * -20 + 8x2 * -20) + x(-7 + -10x + 8x2) + x2(-7 + -10x + 8x2)) = 0
((140 + 200x + -160x2) + x(-7 + -10x + 8x2) + x2(-7 + -10x + 8x2)) = 0
(140 + 200x + -160x2 + (-7 * x + -10x * x + 8x2 * x) + x2(-7 + -10x + 8x2)) = 0
(140 + 200x + -160x2 + (-7x + -10x2 + 8x3) + x2(-7 + -10x + 8x2)) = 0
(140 + 200x + -160x2 + -7x + -10x2 + 8x3 + (-7 * x2 + -10x * x2 + 8x2 * x2)) = 0
(140 + 200x + -160x2 + -7x + -10x2 + 8x3 + (-7x2 + -10x3 + 8x4)) = 0

Reorder the terms:
(140 + 200x + -7x + -160x2 + -10x2 + -7x2 + 8x3 + -10x3 + 8x4) = 0

Combine like terms: 200x + -7x = 193x
(140 + 193x + -160x2 + -10x2 + -7x2 + 8x3 + -10x3 + 8x4) = 0

Combine like terms: -160x2 + -10x2 = -170x2
(140 + 193x + -170x2 + -7x2 + 8x3 + -10x3 + 8x4) = 0

Combine like terms: -170x2 + -7x2 = -177x2
(140 + 193x + -177x2 + 8x3 + -10x3 + 8x4) = 0

Combine like terms: 8x3 + -10x3 = -2x3
(140 + 193x + -177x2 + -2x3 + 8x4) = 0

Solving
140 + 193x + -177x2 + -2x3 + 8x4 = 0

Solving for variable 'x'.

The solution to this equation could not be determined.

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