-2x^2-3x+10=20

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Solution for -2x^2-3x+10=20 equation:


Simplifying
-2x2 + -3x + 10 = 20

Reorder the terms:
10 + -3x + -2x2 = 20

Solving
10 + -3x + -2x2 = 20

Solving for variable 'x'.

Reorder the terms:
10 + -20 + -3x + -2x2 = 20 + -20

Combine like terms: 10 + -20 = -10
-10 + -3x + -2x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-10 + -3x + -2x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(10 + 3x + 2x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(10 + 3x + 2x2)' equal to zero and attempt to solve: Simplifying 10 + 3x + 2x2 = 0 Solving 10 + 3x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. 5 + 1.5x + x2 = 0 Move the constant term to the right: Add '-5' to each side of the equation. 5 + 1.5x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + 1.5x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 1.5x + x2 = 0 + -5 1.5x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 1.5x + x2 = -5 The x term is 1.5x. Take half its coefficient (0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. 1.5x + 0.5625 + x2 = -5 + 0.5625 Reorder the terms: 0.5625 + 1.5x + x2 = -5 + 0.5625 Combine like terms: -5 + 0.5625 = -4.4375 0.5625 + 1.5x + x2 = -4.4375 Factor a perfect square on the left side: (x + 0.75)(x + 0.75) = -4.4375 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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