2x^2-x+7=8

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Solution for 2x^2-x+7=8 equation:


Simplifying
2x2 + -1x + 7 = 8

Reorder the terms:
7 + -1x + 2x2 = 8

Solving
7 + -1x + 2x2 = 8

Solving for variable 'x'.

Reorder the terms:
7 + -8 + -1x + 2x2 = 8 + -8

Combine like terms: 7 + -8 = -1
-1 + -1x + 2x2 = 8 + -8

Combine like terms: 8 + -8 = 0
-1 + -1x + 2x2 = 0

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

Subproblem 1

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

Subproblem 2

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

Solution

x = {-0.5, 1}

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