7x(-8-x+7)=100

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Solution for 7x(-8-x+7)=100 equation:


Simplifying
7x(-8 + -1x + 7) = 100

Reorder the terms:
7x(-8 + 7 + -1x) = 100

Combine like terms: -8 + 7 = -1
7x(-1 + -1x) = 100
(-1 * 7x + -1x * 7x) = 100
(-7x + -7x2) = 100

Solving
-7x + -7x2 = 100

Solving for variable 'x'.

Reorder the terms:
-100 + -7x + -7x2 = 100 + -100

Combine like terms: 100 + -100 = 0
-100 + -7x + -7x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(100 + 7x + 7x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(100 + 7x + 7x2)' equal to zero and attempt to solve: Simplifying 100 + 7x + 7x2 = 0 Solving 100 + 7x + 7x2 = 0 Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 14.28571429 + x + x2 = 0 Move the constant term to the right: Add '-14.28571429' to each side of the equation. 14.28571429 + x + -14.28571429 + x2 = 0 + -14.28571429 Reorder the terms: 14.28571429 + -14.28571429 + x + x2 = 0 + -14.28571429 Combine like terms: 14.28571429 + -14.28571429 = 0.00000000 0.00000000 + x + x2 = 0 + -14.28571429 x + x2 = 0 + -14.28571429 Combine like terms: 0 + -14.28571429 = -14.28571429 x + x2 = -14.28571429 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. + 0.25 + x2 = -14.28571429 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + x2 = -14.28571429 + 0.25 Combine like terms: -14.28571429 + 0.25 = -14.03571429 1.25 + x2 = -14.03571429 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = -14.03571429 Can't calculate square root of the right side. 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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