0=7+2x^2+4x-5

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Solution for 0=7+2x^2+4x-5 equation:


Simplifying
0 = 7 + 2x2 + 4x + -5

Reorder the terms:
0 = 7 + -5 + 4x + 2x2

Combine like terms: 7 + -5 = 2
0 = 2 + 4x + 2x2

Solving
0 = 2 + 4x + 2x2

Solving for variable 'x'.

Combine like terms: 0 + -2 = -2
-2 + -4x + -2x2 = 2 + 4x + 2x2 + -2 + -4x + -2x2

Reorder the terms:
-2 + -4x + -2x2 = 2 + -2 + 4x + -4x + 2x2 + -2x2

Combine like terms: 2 + -2 = 0
-2 + -4x + -2x2 = 0 + 4x + -4x + 2x2 + -2x2
-2 + -4x + -2x2 = 4x + -4x + 2x2 + -2x2

Combine like terms: 4x + -4x = 0
-2 + -4x + -2x2 = 0 + 2x2 + -2x2
-2 + -4x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-2 + -4x + -2x2 = 0

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

Factor a trinomial.
-2((1 + x)(1 + x)) = 0

Ignore the factor -2.

Subproblem 1

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Subproblem 2

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Solution

x = {-1, -1}

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