2n^2+7n=4

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Solution for 2n^2+7n=4 equation:


Simplifying
2n2 + 7n = 4

Reorder the terms:
7n + 2n2 = 4

Solving
7n + 2n2 = 4

Solving for variable 'n'.

Reorder the terms:
-4 + 7n + 2n2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + 7n + 2n2 = 0

Factor a trinomial.
(-4 + -1n)(1 + -2n) = 0

Subproblem 1

Set the factor '(-4 + -1n)' equal to zero and attempt to solve: Simplifying -4 + -1n = 0 Solving -4 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1n = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1n = 0 + 4 -1n = 0 + 4 Combine like terms: 0 + 4 = 4 -1n = 4 Divide each side by '-1'. n = -4 Simplifying n = -4

Subproblem 2

Set the factor '(1 + -2n)' equal to zero and attempt to solve: Simplifying 1 + -2n = 0 Solving 1 + -2n = 0 Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -2n = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -2n = 0 + -1 -2n = 0 + -1 Combine like terms: 0 + -1 = -1 -2n = -1 Divide each side by '-2'. n = 0.5 Simplifying n = 0.5

Solution

n = {-4, 0.5}

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