40=-x^2+22x

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Solution for 40=-x^2+22x equation:


Simplifying
40 = -1x2 + 22x

Reorder the terms:
40 = 22x + -1x2

Solving
40 = 22x + -1x2

Solving for variable 'x'.

Reorder the terms:
40 + -22x + x2 = 22x + -22x + -1x2 + x2

Combine like terms: 22x + -22x = 0
40 + -22x + x2 = 0 + -1x2 + x2
40 + -22x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
40 + -22x + x2 = 0

Factor a trinomial.
(2 + -1x)(20 + -1x) = 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 '(20 + -1x)' equal to zero and attempt to solve: Simplifying 20 + -1x = 0 Solving 20 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -1x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -1x = 0 + -20 -1x = 0 + -20 Combine like terms: 0 + -20 = -20 -1x = -20 Divide each side by '-1'. x = 20 Simplifying x = 20

Solution

x = {2, 20}

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