(7x^2)(2x^5+5)(x^2-4x-9)=

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Solution for (7x^2)(2x^5+5)(x^2-4x-9)= equation: 


Simplifying
(7x2)(2x5 + 5)(x2 + -4x + -9) = 0

Remove parenthesis around (7x2)
7x2(2x5 + 5)(x2 + -4x + -9) = 0

Reorder the terms:
7x2(5 + 2x5)(x2 + -4x + -9) = 0

Reorder the terms:
7x2(5 + 2x5)(-9 + -4x + x2) = 0

Multiply (5 + 2x5) * (-9 + -4x + x2)
7x2(5(-9 + -4x + x2) + 2x5 * (-9 + -4x + x2)) = 0
7x2((-9 * 5 + -4x * 5 + x2 * 5) + 2x5 * (-9 + -4x + x2)) = 0
7x2((-45 + -20x + 5x2) + 2x5 * (-9 + -4x + x2)) = 0
7x2(-45 + -20x + 5x2 + (-9 * 2x5 + -4x * 2x5 + x2 * 2x5)) = 0
7x2(-45 + -20x + 5x2 + (-18x5 + -8x6 + 2x7)) = 0
7x2(-45 + -20x + 5x2 + -18x5 + -8x6 + 2x7) = 0
(-45 * 7x2 + -20x * 7x2 + 5x2 * 7x2 + -18x5 * 7x2 + -8x6 * 7x2 + 2x7 * 7x2) = 0
(-315x2 + -140x3 + 35x4 + -126x7 + -56x8 + 14x9) = 0

Solving
-315x2 + -140x3 + 35x4 + -126x7 + -56x8 + 14x9 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '7x2'.
7x2(-45 + -20x + 5x2 + -18x5 + -8x6 + 2x7) = 0

Ignore the factor 7.

Subproblem 1
Set the factor 'x2' equal to zero and attempt to solve:

Simplifying
x2 = 0

Solving
x2 = 0

Move all terms containing x to the left, all other terms to the right.

Simplifying
x2 = 0

Take the square root of each side:
x = {0}

Subproblem 2
Set the factor '(-45 + -20x + 5x2 + -18x5 + -8x6 + 2x7)' equal to zero and attempt to solve:

Simplifying
-45 + -20x + 5x2 + -18x5 + -8x6 + 2x7 = 0

Solving
-45 + -20x + 5x2 + -18x5 + -8x6 + 2x7 = 0

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.
Solution
x = {0}

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