10n^2-21n=49

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Solution for 10n^2-21n=49 equation:


Simplifying
10n2 + -21n = 49

Reorder the terms:
-21n + 10n2 = 49

Solving
-21n + 10n2 = 49

Solving for variable 'n'.

Reorder the terms:
-49 + -21n + 10n2 = 49 + -49

Combine like terms: 49 + -49 = 0
-49 + -21n + 10n2 = 0

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

Subproblem 1

Set the factor '(-7 + -5n)' equal to zero and attempt to solve: Simplifying -7 + -5n = 0 Solving -7 + -5n = 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 + -5n = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -5n = 0 + 7 -5n = 0 + 7 Combine like terms: 0 + 7 = 7 -5n = 7 Divide each side by '-5'. n = -1.4 Simplifying n = -1.4

Subproblem 2

Set the factor '(7 + -2n)' equal to zero and attempt to solve: Simplifying 7 + -2n = 0 Solving 7 + -2n = 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 + -2n = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2n = 0 + -7 -2n = 0 + -7 Combine like terms: 0 + -7 = -7 -2n = -7 Divide each side by '-2'. n = 3.5 Simplifying n = 3.5

Solution

n = {-1.4, 3.5}

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