(3x+15)(x^2+10x+21)=0

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Solution for (3x+15)(x^2+10x+21)=0 equation:


Simplifying
(3x + 15)(x2 + 10x + 21) = 0

Reorder the terms:
(15 + 3x)(x2 + 10x + 21) = 0

Reorder the terms:
(15 + 3x)(21 + 10x + x2) = 0

Multiply (15 + 3x) * (21 + 10x + x2)
(15(21 + 10x + x2) + 3x * (21 + 10x + x2)) = 0
((21 * 15 + 10x * 15 + x2 * 15) + 3x * (21 + 10x + x2)) = 0
((315 + 150x + 15x2) + 3x * (21 + 10x + x2)) = 0
(315 + 150x + 15x2 + (21 * 3x + 10x * 3x + x2 * 3x)) = 0
(315 + 150x + 15x2 + (63x + 30x2 + 3x3)) = 0

Reorder the terms:
(315 + 150x + 63x + 15x2 + 30x2 + 3x3) = 0

Combine like terms: 150x + 63x = 213x
(315 + 213x + 15x2 + 30x2 + 3x3) = 0

Combine like terms: 15x2 + 30x2 = 45x2
(315 + 213x + 45x2 + 3x3) = 0

Solving
315 + 213x + 45x2 + 3x3 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(105 + 71x + 15x2 + x3) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(105 + 71x + 15x2 + x3)' equal to zero and attempt to solve: Simplifying 105 + 71x + 15x2 + x3 = 0 Solving 105 + 71x + 15x2 + x3 = 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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