4t^2-9t+16=15-4+2

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Solution for 4t^2-9t+16=15-4+2 equation:


Simplifying
4t2 + -9t + 16 = 15 + -4 + 2

Reorder the terms:
16 + -9t + 4t2 = 15 + -4 + 2

Combine like terms: 15 + -4 = 11
16 + -9t + 4t2 = 11 + 2

Combine like terms: 11 + 2 = 13
16 + -9t + 4t2 = 13

Solving
16 + -9t + 4t2 = 13

Solving for variable 't'.

Reorder the terms:
16 + -13 + -9t + 4t2 = 13 + -13

Combine like terms: 16 + -13 = 3
3 + -9t + 4t2 = 13 + -13

Combine like terms: 13 + -13 = 0
3 + -9t + 4t2 = 0

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

Divide each side by '4'.
0.75 + -2.25t + t2 = 0

Move the constant term to the right:

Add '-0.75' to each side of the equation.
0.75 + -2.25t + -0.75 + t2 = 0 + -0.75

Reorder the terms:
0.75 + -0.75 + -2.25t + t2 = 0 + -0.75

Combine like terms: 0.75 + -0.75 = 0.00
0.00 + -2.25t + t2 = 0 + -0.75
-2.25t + t2 = 0 + -0.75

Combine like terms: 0 + -0.75 = -0.75
-2.25t + t2 = -0.75

The t term is -2.25t.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25t + 1.265625 + t2 = -0.75 + 1.265625

Reorder the terms:
1.265625 + -2.25t + t2 = -0.75 + 1.265625

Combine like terms: -0.75 + 1.265625 = 0.515625
1.265625 + -2.25t + t2 = 0.515625

Factor a perfect square on the left side:
(t + -1.125)(t + -1.125) = 0.515625

Calculate the square root of the right side: 0.718070331

Break this problem into two subproblems by setting 
(t + -1.125) equal to 0.718070331 and -0.718070331.

Subproblem 1

t + -1.125 = 0.718070331 Simplifying t + -1.125 = 0.718070331 Reorder the terms: -1.125 + t = 0.718070331 Solving -1.125 + t = 0.718070331 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + t = 0.718070331 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + t = 0.718070331 + 1.125 t = 0.718070331 + 1.125 Combine like terms: 0.718070331 + 1.125 = 1.843070331 t = 1.843070331 Simplifying t = 1.843070331

Subproblem 2

t + -1.125 = -0.718070331 Simplifying t + -1.125 = -0.718070331 Reorder the terms: -1.125 + t = -0.718070331 Solving -1.125 + t = -0.718070331 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + t = -0.718070331 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + t = -0.718070331 + 1.125 t = -0.718070331 + 1.125 Combine like terms: -0.718070331 + 1.125 = 0.406929669 t = 0.406929669 Simplifying t = 0.406929669

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.843070331, 0.406929669}

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