3x^2+x-7=x^2-1

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

Simplifying
3x2 + x + -7 = x2 + -1

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

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

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

Solving for variable 'x'.

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

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

Combine like terms: 3x2 + -1x2 = 2x2
-6 + x + 2x2 = -1 + x2 + 1 + -1x2

Reorder the terms:
-6 + x + 2x2 = -1 + 1 + x2 + -1x2

Combine like terms: -1 + 1 = 0
-6 + x + 2x2 = 0 + x2 + -1x2
-6 + x + 2x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
-6 + x + 2x2 = 0

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

Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve:

Simplifying
-2 + -1x = 0

Solving
-2 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '2' to each side of the equation.
-2 + 2 + -1x = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1x = 0 + 2
-1x = 0 + 2

Combine like terms: 0 + 2 = 2
-1x = 2

Divide each side by '-1'.
x = -2

Simplifying
x = -2
Subproblem 2
Set the factor '(3 + -2x)' equal to zero and attempt to solve:

Simplifying
3 + -2x = 0

Solving
3 + -2x = 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 + -2x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -2x = 0 + -3
-2x = 0 + -3

Combine like terms: 0 + -3 = -3
-2x = -3

Divide each side by '-2'.
x = 1.5

Simplifying
x = 1.5
Solution
x = {-2, 1.5}