15=2t^2-6t+7

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Solution for 15=2t^2-6t+7 equation:


Simplifying
15 = 2t2 + -6t + 7

Reorder the terms:
15 = 7 + -6t + 2t2

Solving
15 = 7 + -6t + 2t2

Solving for variable 't'.

Combine like terms: 15 + -7 = 8
8 + 6t + -2t2 = 7 + -6t + 2t2 + -7 + 6t + -2t2

Reorder the terms:
8 + 6t + -2t2 = 7 + -7 + -6t + 6t + 2t2 + -2t2

Combine like terms: 7 + -7 = 0
8 + 6t + -2t2 = 0 + -6t + 6t + 2t2 + -2t2
8 + 6t + -2t2 = -6t + 6t + 2t2 + -2t2

Combine like terms: -6t + 6t = 0
8 + 6t + -2t2 = 0 + 2t2 + -2t2
8 + 6t + -2t2 = 2t2 + -2t2

Combine like terms: 2t2 + -2t2 = 0
8 + 6t + -2t2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(4 + 3t + -1t2) = 0

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

Ignore the factor 2.

Subproblem 1

Set the factor '(4 + -1t)' equal to zero and attempt to solve: Simplifying 4 + -1t = 0 Solving 4 + -1t = 0 Move all terms containing t to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1t = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1t = 0 + -4 -1t = 0 + -4 Combine like terms: 0 + -4 = -4 -1t = -4 Divide each side by '-1'. t = 4 Simplifying t = 4

Subproblem 2

Set the factor '(1 + t)' equal to zero and attempt to solve: Simplifying 1 + t = 0 Solving 1 + t = 0 Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + t = 0 + -1 Combine like terms: 1 + -1 = 0 0 + t = 0 + -1 t = 0 + -1 Combine like terms: 0 + -1 = -1 t = -1 Simplifying t = -1

Solution

t = {4, -1}

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