-3x^2-14x-7=(x-1)(x+1)

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Solution for -3x^2-14x-7=(x-1)(x+1) equation:


Simplifying
-3x2 + -14x + -7 = (x + -1)(x + 1)

Reorder the terms:
-7 + -14x + -3x2 = (x + -1)(x + 1)

Reorder the terms:
-7 + -14x + -3x2 = (-1 + x)(x + 1)

Reorder the terms:
-7 + -14x + -3x2 = (-1 + x)(1 + x)

Multiply (-1 + x) * (1 + x)
-7 + -14x + -3x2 = (-1(1 + x) + x(1 + x))
-7 + -14x + -3x2 = ((1 * -1 + x * -1) + x(1 + x))
-7 + -14x + -3x2 = ((-1 + -1x) + x(1 + x))
-7 + -14x + -3x2 = (-1 + -1x + (1 * x + x * x))
-7 + -14x + -3x2 = (-1 + -1x + (1x + x2))

Combine like terms: -1x + 1x = 0
-7 + -14x + -3x2 = (-1 + 0 + x2)
-7 + -14x + -3x2 = (-1 + x2)

Solving
-7 + -14x + -3x2 = -1 + x2

Solving for variable 'x'.

Reorder the terms:
-7 + 1 + -14x + -3x2 + -1x2 = -1 + x2 + 1 + -1x2

Combine like terms: -7 + 1 = -6
-6 + -14x + -3x2 + -1x2 = -1 + x2 + 1 + -1x2

Combine like terms: -3x2 + -1x2 = -4x2
-6 + -14x + -4x2 = -1 + x2 + 1 + -1x2

Reorder the terms:
-6 + -14x + -4x2 = -1 + 1 + x2 + -1x2

Combine like terms: -1 + 1 = 0
-6 + -14x + -4x2 = 0 + x2 + -1x2
-6 + -14x + -4x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-6 + -14x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '-2'.
-2(3 + 7x + 2x2) = 0

Factor a trinomial.
-2((3 + x)(1 + 2x)) = 0

Ignore the factor -2.

Subproblem 1

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(1 + 2x)' equal to zero and attempt to solve: Simplifying 1 + 2x = 0 Solving 1 + 2x = 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 + 2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2x = 0 + -1 2x = 0 + -1 Combine like terms: 0 + -1 = -1 2x = -1 Divide each side by '2'. x = -0.5 Simplifying x = -0.5

Solution

x = {-3, -0.5}

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