(16-4x^2)(16-8x-3x^2)=-140

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Solution for (16-4x^2)(16-8x-3x^2)=-140 equation: 


Simplifying
(16 + -4x2)(16 + -8x + -3x2) = -140

Multiply (16 + -4x2) * (16 + -8x + -3x2)
(16(16 + -8x + -3x2) + -4x2 * (16 + -8x + -3x2)) = -140
((16 * 16 + -8x * 16 + -3x2 * 16) + -4x2 * (16 + -8x + -3x2)) = -140
((256 + -128x + -48x2) + -4x2 * (16 + -8x + -3x2)) = -140
(256 + -128x + -48x2 + (16 * -4x2 + -8x * -4x2 + -3x2 * -4x2)) = -140
(256 + -128x + -48x2 + (-64x2 + 32x3 + 12x4)) = -140

Combine like terms: -48x2 + -64x2 = -112x2
(256 + -128x + -112x2 + 32x3 + 12x4) = -140

Solving
256 + -128x + -112x2 + 32x3 + 12x4 = -140

Solving for variable 'x'.

Reorder the terms:
256 + 140 + -128x + -112x2 + 32x3 + 12x4 = -140 + 140

Combine like terms: 256 + 140 = 396
396 + -128x + -112x2 + 32x3 + 12x4 = -140 + 140

Combine like terms: -140 + 140 = 0
396 + -128x + -112x2 + 32x3 + 12x4 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(99 + -32x + -28x2 + 8x3 + 3x4) = 0

Ignore the factor 4.

Subproblem 1
Set the factor '(99 + -32x + -28x2 + 8x3 + 3x4)' equal to zero and attempt to solve:

Simplifying
99 + -32x + -28x2 + 8x3 + 3x4 = 0

Solving
99 + -32x + -28x2 + 8x3 + 3x4 = 0

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

The solution to this equation could not be determined.

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