(7n-2)(5n+15)=0

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Solution for (7n-2)(5n+15)=0 equation:


Simplifying
(7n + -2)(5n + 15) = 0

Reorder the terms:
(-2 + 7n)(5n + 15) = 0

Reorder the terms:
(-2 + 7n)(15 + 5n) = 0

Multiply (-2 + 7n) * (15 + 5n)
(-2(15 + 5n) + 7n * (15 + 5n)) = 0
((15 * -2 + 5n * -2) + 7n * (15 + 5n)) = 0
((-30 + -10n) + 7n * (15 + 5n)) = 0
(-30 + -10n + (15 * 7n + 5n * 7n)) = 0
(-30 + -10n + (105n + 35n2)) = 0

Combine like terms: -10n + 105n = 95n
(-30 + 95n + 35n2) = 0

Solving
-30 + 95n + 35n2 = 0

Solving for variable 'n'.

Factor out the Greatest Common Factor (GCF), '5'.
5(-6 + 19n + 7n2) = 0

Factor a trinomial.
5((-3 + -1n)(2 + -7n)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-3 + -1n)' equal to zero and attempt to solve: Simplifying -3 + -1n = 0 Solving -3 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -1n = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -1n = 0 + 3 -1n = 0 + 3 Combine like terms: 0 + 3 = 3 -1n = 3 Divide each side by '-1'. n = -3 Simplifying n = -3

Subproblem 2

Set the factor '(2 + -7n)' equal to zero and attempt to solve: Simplifying 2 + -7n = 0 Solving 2 + -7n = 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 + -7n = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -7n = 0 + -2 -7n = 0 + -2 Combine like terms: 0 + -2 = -2 -7n = -2 Divide each side by '-7'. n = 0.2857142857 Simplifying n = 0.2857142857

Solution

n = {-3, 0.2857142857}

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