7n^2-40=-51n

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Solution for 7n^2-40=-51n equation:


Simplifying
7n2 + -40 = -51n

Reorder the terms:
-40 + 7n2 = -51n

Solving
-40 + 7n2 = -51n

Solving for variable 'n'.

Reorder the terms:
-40 + 51n + 7n2 = -51n + 51n

Combine like terms: -51n + 51n = 0
-40 + 51n + 7n2 = 0

Factor a trinomial.
(-8 + -1n)(5 + -7n) = 0

Subproblem 1

Set the factor '(-8 + -1n)' equal to zero and attempt to solve: Simplifying -8 + -1n = 0 Solving -8 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -1n = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1n = 0 + 8 -1n = 0 + 8 Combine like terms: 0 + 8 = 8 -1n = 8 Divide each side by '-1'. n = -8 Simplifying n = -8

Subproblem 2

Set the factor '(5 + -7n)' equal to zero and attempt to solve: Simplifying 5 + -7n = 0 Solving 5 + -7n = 0 Move all terms containing n to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -7n = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -7n = 0 + -5 -7n = 0 + -5 Combine like terms: 0 + -5 = -5 -7n = -5 Divide each side by '-7'. n = 0.7142857143 Simplifying n = 0.7142857143

Solution

n = {-8, 0.7142857143}

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