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Simplifying (7x + -21)(x2 + 10x + 21) = 0 Reorder the terms: (-21 + 7x)(x2 + 10x + 21) = 0 Reorder the terms: (-21 + 7x)(21 + 10x + x2) = 0 Multiply (-21 + 7x) * (21 + 10x + x2) (-21(21 + 10x + x2) + 7x * (21 + 10x + x2)) = 0 ((21 * -21 + 10x * -21 + x2 * -21) + 7x * (21 + 10x + x2)) = 0 ((-441 + -210x + -21x2) + 7x * (21 + 10x + x2)) = 0 (-441 + -210x + -21x2 + (21 * 7x + 10x * 7x + x2 * 7x)) = 0 (-441 + -210x + -21x2 + (147x + 70x2 + 7x3)) = 0 Reorder the terms: (-441 + -210x + 147x + -21x2 + 70x2 + 7x3) = 0 Combine like terms: -210x + 147x = -63x (-441 + -63x + -21x2 + 70x2 + 7x3) = 0 Combine like terms: -21x2 + 70x2 = 49x2 (-441 + -63x + 49x2 + 7x3) = 0 Solving -441 + -63x + 49x2 + 7x3 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '7'. 7(-63 + -9x + 7x2 + x3) = 0 Ignore the factor 7.Subproblem 1
Set the factor '(-63 + -9x + 7x2 + x3)' equal to zero and attempt to solve: Simplifying -63 + -9x + 7x2 + x3 = 0 Solving -63 + -9x + 7x2 + 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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