2x*x=28-x

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Solution for 2x*x=28-x equation:


Simplifying
2x * x = 28 + -1x

Multiply x * x
2x2 = 28 + -1x

Solving
2x2 = 28 + -1x

Solving for variable 'x'.

Reorder the terms:
-28 + x + 2x2 = 28 + -1x + -28 + x

Reorder the terms:
-28 + x + 2x2 = 28 + -28 + -1x + x

Combine like terms: 28 + -28 = 0
-28 + x + 2x2 = 0 + -1x + x
-28 + x + 2x2 = -1x + x

Combine like terms: -1x + x = 0
-28 + x + 2x2 = 0

Factor a trinomial.
(-4 + -1x)(7 + -2x) = 0

Subproblem 1

Set the factor '(-4 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4

Subproblem 2

Set the factor '(7 + -2x)' equal to zero and attempt to solve: Simplifying 7 + -2x = 0 Solving 7 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2x = 0 + -7 -2x = 0 + -7 Combine like terms: 0 + -7 = -7 -2x = -7 Divide each side by '-2'. x = 3.5 Simplifying x = 3.5

Solution

x = {-4, 3.5}

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