n^2+20n-51=-7

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Solution for n^2+20n-51=-7 equation:


Simplifying
n2 + 20n + -51 = -7

Reorder the terms:
-51 + 20n + n2 = -7

Solving
-51 + 20n + n2 = -7

Solving for variable 'n'.

Reorder the terms:
-51 + 7 + 20n + n2 = -7 + 7

Combine like terms: -51 + 7 = -44
-44 + 20n + n2 = -7 + 7

Combine like terms: -7 + 7 = 0
-44 + 20n + n2 = 0

Factor a trinomial.
(-22 + -1n)(2 + -1n) = 0

Subproblem 1

Set the factor '(-22 + -1n)' equal to zero and attempt to solve: Simplifying -22 + -1n = 0 Solving -22 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '22' to each side of the equation. -22 + 22 + -1n = 0 + 22 Combine like terms: -22 + 22 = 0 0 + -1n = 0 + 22 -1n = 0 + 22 Combine like terms: 0 + 22 = 22 -1n = 22 Divide each side by '-1'. n = -22 Simplifying n = -22

Subproblem 2

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

Solution

n = {-22, 2}

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