0=4t^2-3t-70

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Solution for 0=4t^2-3t-70 equation:


Simplifying
0 = 4t2 + -3t + -70

Reorder the terms:
0 = -70 + -3t + 4t2

Solving
0 = -70 + -3t + 4t2

Solving for variable 't'.

Combine like terms: 0 + 70 = 70
70 + 3t + -4t2 = -70 + -3t + 4t2 + 70 + 3t + -4t2

Reorder the terms:
70 + 3t + -4t2 = -70 + 70 + -3t + 3t + 4t2 + -4t2

Combine like terms: -70 + 70 = 0
70 + 3t + -4t2 = 0 + -3t + 3t + 4t2 + -4t2
70 + 3t + -4t2 = -3t + 3t + 4t2 + -4t2

Combine like terms: -3t + 3t = 0
70 + 3t + -4t2 = 0 + 4t2 + -4t2
70 + 3t + -4t2 = 4t2 + -4t2

Combine like terms: 4t2 + -4t2 = 0
70 + 3t + -4t2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-17.5 + -0.75t + t2 = 0

Move the constant term to the right:

Add '17.5' to each side of the equation.
-17.5 + -0.75t + 17.5 + t2 = 0 + 17.5

Reorder the terms:
-17.5 + 17.5 + -0.75t + t2 = 0 + 17.5

Combine like terms: -17.5 + 17.5 = 0.0
0.0 + -0.75t + t2 = 0 + 17.5
-0.75t + t2 = 0 + 17.5

Combine like terms: 0 + 17.5 = 17.5
-0.75t + t2 = 17.5

The t term is -0.75t.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75t + 0.140625 + t2 = 17.5 + 0.140625

Reorder the terms:
0.140625 + -0.75t + t2 = 17.5 + 0.140625

Combine like terms: 17.5 + 0.140625 = 17.640625
0.140625 + -0.75t + t2 = 17.640625

Factor a perfect square on the left side:
(t + -0.375)(t + -0.375) = 17.640625

Calculate the square root of the right side: 4.200074404

Break this problem into two subproblems by setting 
(t + -0.375) equal to 4.200074404 and -4.200074404.

Subproblem 1

t + -0.375 = 4.200074404 Simplifying t + -0.375 = 4.200074404 Reorder the terms: -0.375 + t = 4.200074404 Solving -0.375 + t = 4.200074404 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + t = 4.200074404 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + t = 4.200074404 + 0.375 t = 4.200074404 + 0.375 Combine like terms: 4.200074404 + 0.375 = 4.575074404 t = 4.575074404 Simplifying t = 4.575074404

Subproblem 2

t + -0.375 = -4.200074404 Simplifying t + -0.375 = -4.200074404 Reorder the terms: -0.375 + t = -4.200074404 Solving -0.375 + t = -4.200074404 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + t = -4.200074404 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + t = -4.200074404 + 0.375 t = -4.200074404 + 0.375 Combine like terms: -4.200074404 + 0.375 = -3.825074404 t = -3.825074404 Simplifying t = -3.825074404

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.575074404, -3.825074404}

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