0.83t^2-7t+10=0

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Solution for 0.83t^2-7t+10=0 equation:


Simplifying
0.83t2 + -7t + 10 = 0

Reorder the terms:
10 + -7t + 0.83t2 = 0

Solving
10 + -7t + 0.83t2 = 0

Solving for variable 't'.

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

Divide each side by '0.83'.
12.04819277 + -8.43373494t + t2 = 0

Move the constant term to the right:

Add '-12.04819277' to each side of the equation.
12.04819277 + -8.43373494t + -12.04819277 + t2 = 0 + -12.04819277

Reorder the terms:
12.04819277 + -12.04819277 + -8.43373494t + t2 = 0 + -12.04819277

Combine like terms: 12.04819277 + -12.04819277 = 0.00000000
0.00000000 + -8.43373494t + t2 = 0 + -12.04819277
-8.43373494t + t2 = 0 + -12.04819277

Combine like terms: 0 + -12.04819277 = -12.04819277
-8.43373494t + t2 = -12.04819277

The t term is -8.43373494t.  Take half its coefficient (-4.21686747).
Square it (17.78197126) and add it to both sides.

Add '17.78197126' to each side of the equation.
-8.43373494t + 17.78197126 + t2 = -12.04819277 + 17.78197126

Reorder the terms:
17.78197126 + -8.43373494t + t2 = -12.04819277 + 17.78197126

Combine like terms: -12.04819277 + 17.78197126 = 5.73377849
17.78197126 + -8.43373494t + t2 = 5.73377849

Factor a perfect square on the left side:
(t + -4.21686747)(t + -4.21686747) = 5.73377849

Calculate the square root of the right side: 2.394530954

Break this problem into two subproblems by setting 
(t + -4.21686747) equal to 2.394530954 and -2.394530954.

Subproblem 1

t + -4.21686747 = 2.394530954 Simplifying t + -4.21686747 = 2.394530954 Reorder the terms: -4.21686747 + t = 2.394530954 Solving -4.21686747 + t = 2.394530954 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4.21686747' to each side of the equation. -4.21686747 + 4.21686747 + t = 2.394530954 + 4.21686747 Combine like terms: -4.21686747 + 4.21686747 = 0.00000000 0.00000000 + t = 2.394530954 + 4.21686747 t = 2.394530954 + 4.21686747 Combine like terms: 2.394530954 + 4.21686747 = 6.611398424 t = 6.611398424 Simplifying t = 6.611398424

Subproblem 2

t + -4.21686747 = -2.394530954 Simplifying t + -4.21686747 = -2.394530954 Reorder the terms: -4.21686747 + t = -2.394530954 Solving -4.21686747 + t = -2.394530954 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4.21686747' to each side of the equation. -4.21686747 + 4.21686747 + t = -2.394530954 + 4.21686747 Combine like terms: -4.21686747 + 4.21686747 = 0.00000000 0.00000000 + t = -2.394530954 + 4.21686747 t = -2.394530954 + 4.21686747 Combine like terms: -2.394530954 + 4.21686747 = 1.822336516 t = 1.822336516 Simplifying t = 1.822336516

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.611398424, 1.822336516}

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