-7x=2x^2+9

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Solution for -7x=2x^2+9 equation:


Simplifying
-7x = 2x2 + 9

Reorder the terms:
-7x = 9 + 2x2

Solving
-7x = 9 + 2x2

Solving for variable 'x'.

Reorder the terms:
-9 + -7x + -2x2 = 9 + 2x2 + -9 + -2x2

Reorder the terms:
-9 + -7x + -2x2 = 9 + -9 + 2x2 + -2x2

Combine like terms: 9 + -9 = 0
-9 + -7x + -2x2 = 0 + 2x2 + -2x2
-9 + -7x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-9 + -7x + -2x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(9 + 7x + 2x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(9 + 7x + 2x2)' equal to zero and attempt to solve: Simplifying 9 + 7x + 2x2 = 0 Solving 9 + 7x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 4.5 + 3.5x + x2 = 0 Move the constant term to the right: Add '-4.5' to each side of the equation. 4.5 + 3.5x + -4.5 + x2 = 0 + -4.5 Reorder the terms: 4.5 + -4.5 + 3.5x + x2 = 0 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + 3.5x + x2 = 0 + -4.5 3.5x + x2 = 0 + -4.5 Combine like terms: 0 + -4.5 = -4.5 3.5x + x2 = -4.5 The x term is 3.5x. Take half its coefficient (1.75). Square it (3.0625) and add it to both sides. Add '3.0625' to each side of the equation. 3.5x + 3.0625 + x2 = -4.5 + 3.0625 Reorder the terms: 3.0625 + 3.5x + x2 = -4.5 + 3.0625 Combine like terms: -4.5 + 3.0625 = -1.4375 3.0625 + 3.5x + x2 = -1.4375 Factor a perfect square on the left side: (x + 1.75)(x + 1.75) = -1.4375 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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