(n-4)(n+7)=

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Solution for (n-4)(n+7)= equation:


Simplifying
(n + -4)(n + 7) = 0

Reorder the terms:
(-4 + n)(n + 7) = 0

Reorder the terms:
(-4 + n)(7 + n) = 0

Multiply (-4 + n) * (7 + n)
(-4(7 + n) + n(7 + n)) = 0
((7 * -4 + n * -4) + n(7 + n)) = 0
((-28 + -4n) + n(7 + n)) = 0
(-28 + -4n + (7 * n + n * n)) = 0
(-28 + -4n + (7n + n2)) = 0

Combine like terms: -4n + 7n = 3n
(-28 + 3n + n2) = 0

Solving
-28 + 3n + n2 = 0

Solving for variable 'n'.

Factor a trinomial.
(-7 + -1n)(4 + -1n) = 0

Subproblem 1

Set the factor '(-7 + -1n)' equal to zero and attempt to solve: Simplifying -7 + -1n = 0 Solving -7 + -1n = 0 Move all terms containing n to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1n = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1n = 0 + 7 -1n = 0 + 7 Combine like terms: 0 + 7 = 7 -1n = 7 Divide each side by '-1'. n = -7 Simplifying n = -7

Subproblem 2

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

Solution

n = {-7, 4}

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