2t^2-14t+15=

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Solution for 2t^2-14t+15= equation:


Simplifying
2t2 + -14t + 15 = 0

Reorder the terms:
15 + -14t + 2t2 = 0

Solving
15 + -14t + 2t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
7.5 + -7t + t2 = 0

Move the constant term to the right:

Add '-7.5' to each side of the equation.
7.5 + -7t + -7.5 + t2 = 0 + -7.5

Reorder the terms:
7.5 + -7.5 + -7t + t2 = 0 + -7.5

Combine like terms: 7.5 + -7.5 = 0.0
0.0 + -7t + t2 = 0 + -7.5
-7t + t2 = 0 + -7.5

Combine like terms: 0 + -7.5 = -7.5
-7t + t2 = -7.5

The t term is -7t.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7t + 12.25 + t2 = -7.5 + 12.25

Reorder the terms:
12.25 + -7t + t2 = -7.5 + 12.25

Combine like terms: -7.5 + 12.25 = 4.75
12.25 + -7t + t2 = 4.75

Factor a perfect square on the left side:
(t + -3.5)(t + -3.5) = 4.75

Calculate the square root of the right side: 2.179449472

Break this problem into two subproblems by setting 
(t + -3.5) equal to 2.179449472 and -2.179449472.

Subproblem 1

t + -3.5 = 2.179449472 Simplifying t + -3.5 = 2.179449472 Reorder the terms: -3.5 + t = 2.179449472 Solving -3.5 + t = 2.179449472 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + t = 2.179449472 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + t = 2.179449472 + 3.5 t = 2.179449472 + 3.5 Combine like terms: 2.179449472 + 3.5 = 5.679449472 t = 5.679449472 Simplifying t = 5.679449472

Subproblem 2

t + -3.5 = -2.179449472 Simplifying t + -3.5 = -2.179449472 Reorder the terms: -3.5 + t = -2.179449472 Solving -3.5 + t = -2.179449472 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + t = -2.179449472 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + t = -2.179449472 + 3.5 t = -2.179449472 + 3.5 Combine like terms: -2.179449472 + 3.5 = 1.320550528 t = 1.320550528 Simplifying t = 1.320550528

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.679449472, 1.320550528}

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