x^2+3x=700

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Solution for x^2+3x=700 equation:


Simplifying
x2 + 3x = 700

Reorder the terms:
3x + x2 = 700

Solving
3x + x2 = 700

Solving for variable 'x'.

Reorder the terms:
-700 + 3x + x2 = 700 + -700

Combine like terms: 700 + -700 = 0
-700 + 3x + x2 = 0

Factor a trinomial.
(-28 + -1x)(25 + -1x) = 0

Subproblem 1

Set the factor '(-28 + -1x)' equal to zero and attempt to solve: Simplifying -28 + -1x = 0 Solving -28 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + -1x = 0 + 28 Combine like terms: -28 + 28 = 0 0 + -1x = 0 + 28 -1x = 0 + 28 Combine like terms: 0 + 28 = 28 -1x = 28 Divide each side by '-1'. x = -28 Simplifying x = -28

Subproblem 2

Set the factor '(25 + -1x)' equal to zero and attempt to solve: Simplifying 25 + -1x = 0 Solving 25 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-25' to each side of the equation. 25 + -25 + -1x = 0 + -25 Combine like terms: 25 + -25 = 0 0 + -1x = 0 + -25 -1x = 0 + -25 Combine like terms: 0 + -25 = -25 -1x = -25 Divide each side by '-1'. x = 25 Simplifying x = 25

Solution

x = {-28, 25}

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