7=8t+t^2

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Solution for 7=8t+t^2 equation:


Simplifying
7 = 8t + t2

Solving
7 = 8t + t2

Solving for variable 't'.

Reorder the terms:
7 + -8t + -1t2 = 8t + -8t + t2 + -1t2

Combine like terms: 8t + -8t = 0
7 + -8t + -1t2 = 0 + t2 + -1t2
7 + -8t + -1t2 = t2 + -1t2

Combine like terms: t2 + -1t2 = 0
7 + -8t + -1t2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-7 + 8t + t2 = 0

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + 8t + 7 + t2 = 0 + 7

Reorder the terms:
-7 + 7 + 8t + t2 = 0 + 7

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

Combine like terms: 0 + 7 = 7
8t + t2 = 7

The t term is 8t.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8t + 16 + t2 = 7 + 16

Reorder the terms:
16 + 8t + t2 = 7 + 16

Combine like terms: 7 + 16 = 23
16 + 8t + t2 = 23

Factor a perfect square on the left side:
(t + 4)(t + 4) = 23

Calculate the square root of the right side: 4.795831523

Break this problem into two subproblems by setting 
(t + 4) equal to 4.795831523 and -4.795831523.

Subproblem 1

t + 4 = 4.795831523 Simplifying t + 4 = 4.795831523 Reorder the terms: 4 + t = 4.795831523 Solving 4 + t = 4.795831523 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + t = 4.795831523 + -4 Combine like terms: 4 + -4 = 0 0 + t = 4.795831523 + -4 t = 4.795831523 + -4 Combine like terms: 4.795831523 + -4 = 0.795831523 t = 0.795831523 Simplifying t = 0.795831523

Subproblem 2

t + 4 = -4.795831523 Simplifying t + 4 = -4.795831523 Reorder the terms: 4 + t = -4.795831523 Solving 4 + t = -4.795831523 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + t = -4.795831523 + -4 Combine like terms: 4 + -4 = 0 0 + t = -4.795831523 + -4 t = -4.795831523 + -4 Combine like terms: -4.795831523 + -4 = -8.795831523 t = -8.795831523 Simplifying t = -8.795831523

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.795831523, -8.795831523}

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