2500=-x^2+40x+2100

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Solution for 2500=-x^2+40x+2100 equation:


Simplifying
2500 = -1x2 + 40x + 2100

Reorder the terms:
2500 = 2100 + 40x + -1x2

Solving
2500 = 2100 + 40x + -1x2

Solving for variable 'x'.

Combine like terms: 2500 + -2100 = 400
400 + -40x + x2 = 2100 + 40x + -1x2 + -2100 + -40x + x2

Reorder the terms:
400 + -40x + x2 = 2100 + -2100 + 40x + -40x + -1x2 + x2

Combine like terms: 2100 + -2100 = 0
400 + -40x + x2 = 0 + 40x + -40x + -1x2 + x2
400 + -40x + x2 = 40x + -40x + -1x2 + x2

Combine like terms: 40x + -40x = 0
400 + -40x + x2 = 0 + -1x2 + x2
400 + -40x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
400 + -40x + x2 = 0

Factor a trinomial.
(20 + -1x)(20 + -1x) = 0

Subproblem 1

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

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 = {20, 20}

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