8x^2-1=3x-7

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Solution for 8x^2-1=3x-7 equation:


Simplifying
8x2 + -1 = 3x + -7

Reorder the terms:
-1 + 8x2 = 3x + -7

Reorder the terms:
-1 + 8x2 = -7 + 3x

Solving
-1 + 8x2 = -7 + 3x

Solving for variable 'x'.

Reorder the terms:
-1 + 7 + -3x + 8x2 = -7 + 3x + 7 + -3x

Combine like terms: -1 + 7 = 6
6 + -3x + 8x2 = -7 + 3x + 7 + -3x

Reorder the terms:
6 + -3x + 8x2 = -7 + 7 + 3x + -3x

Combine like terms: -7 + 7 = 0
6 + -3x + 8x2 = 0 + 3x + -3x
6 + -3x + 8x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
6 + -3x + 8x2 = 0

Begin completing the square.  Divide all terms by
8 the coefficient of the squared term: 

Divide each side by '8'.
0.75 + -0.375x + x2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -0.375x + -0.75 + x2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -0.375x + x2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -0.375x + x2 = 0 + -0.75
-0.375x + x2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-0.375x + x2 = -0.75

The x term is -0.375x.  Take half its coefficient (-0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
-0.375x + 0.03515625 + x2 = -0.75 + 0.03515625

Reorder the terms:
0.03515625 + -0.375x + x2 = -0.75 + 0.03515625

Combine like terms: -0.75 + 0.03515625 = -0.71484375
0.03515625 + -0.375x + x2 = -0.71484375

Factor a perfect square on the left side:
(x + -0.1875)(x + -0.1875) = -0.71484375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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