(-3u^2+u-6)+(7u^2+5u+2)=

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Solution for (-3u^2+u-6)+(7u^2+5u+2)= equation:


Simplifying
(-3u2 + u + -6) + (7u2 + 5u + 2) = 0

Reorder the terms:
(-6 + u + -3u2) + (7u2 + 5u + 2) = 0

Remove parenthesis around (-6 + u + -3u2)
-6 + u + -3u2 + (7u2 + 5u + 2) = 0

Reorder the terms:
-6 + u + -3u2 + (2 + 5u + 7u2) = 0

Remove parenthesis around (2 + 5u + 7u2)
-6 + u + -3u2 + 2 + 5u + 7u2 = 0

Reorder the terms:
-6 + 2 + u + 5u + -3u2 + 7u2 = 0

Combine like terms: -6 + 2 = -4
-4 + u + 5u + -3u2 + 7u2 = 0

Combine like terms: u + 5u = 6u
-4 + 6u + -3u2 + 7u2 = 0

Combine like terms: -3u2 + 7u2 = 4u2
-4 + 6u + 4u2 = 0

Solving
-4 + 6u + 4u2 = 0

Solving for variable 'u'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-2 + 3u + 2u2) = 0

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

Ignore the factor 2.

Subproblem 1

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

Subproblem 2

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

Solution

u = {-2, 0.5}

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