(1.75t^2)+4.17t-25=0

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Solution for (1.75t^2)+4.17t-25=0 equation:


Simplifying
(1.75t2) + 4.17t + -25 = 0

Reorder the terms:
-25 + 4.17t + (1.75t2) = 0

Solving
-25 + 4.17t + (1.75t2) = 0

Solving for variable 't'.

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

Divide each side by '1.75'.
-14.28571429 + 2.382857143t + t2 = 0

Move the constant term to the right:

Add '14.28571429' to each side of the equation.
-14.28571429 + 2.382857143t + 14.28571429 + t2 = 0 + 14.28571429

Reorder the terms:
-14.28571429 + 14.28571429 + 2.382857143t + t2 = 0 + 14.28571429

Combine like terms: -14.28571429 + 14.28571429 = 0.00000000
0.00000000 + 2.382857143t + t2 = 0 + 14.28571429
2.382857143t + t2 = 0 + 14.28571429

Combine like terms: 0 + 14.28571429 = 14.28571429
2.382857143t + t2 = 14.28571429

The t term is 2.382857143t.  Take half its coefficient (1.191428572).
Square it (1.419502042) and add it to both sides.

Add '1.419502042' to each side of the equation.
2.382857143t + 1.419502042 + t2 = 14.28571429 + 1.419502042

Reorder the terms:
1.419502042 + 2.382857143t + t2 = 14.28571429 + 1.419502042

Combine like terms: 14.28571429 + 1.419502042 = 15.705216332
1.419502042 + 2.382857143t + t2 = 15.705216332

Factor a perfect square on the left side:
((t) + 1.191428572)((t) + 1.191428572) = 15.705216332

Calculate the square root of the right side: 3.962980738

Break this problem into two subproblems by setting 
((t) + 1.191428572) equal to 3.962980738 and -3.962980738.

Subproblem 1

(t) + 1.191428572 = 3.962980738 Simplifying (t) + 1.191428572 = 3.962980738 t + 1.191428572 = 3.962980738 Reorder the terms: 1.191428572 + t = 3.962980738 Solving 1.191428572 + t = 3.962980738 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.191428572' to each side of the equation. 1.191428572 + -1.191428572 + t = 3.962980738 + -1.191428572 Combine like terms: 1.191428572 + -1.191428572 = 0.000000000 0.000000000 + t = 3.962980738 + -1.191428572 t = 3.962980738 + -1.191428572 Combine like terms: 3.962980738 + -1.191428572 = 2.771552166 t = 2.771552166 Simplifying t = 2.771552166

Subproblem 2

(t) + 1.191428572 = -3.962980738 Simplifying (t) + 1.191428572 = -3.962980738 t + 1.191428572 = -3.962980738 Reorder the terms: 1.191428572 + t = -3.962980738 Solving 1.191428572 + t = -3.962980738 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.191428572' to each side of the equation. 1.191428572 + -1.191428572 + t = -3.962980738 + -1.191428572 Combine like terms: 1.191428572 + -1.191428572 = 0.000000000 0.000000000 + t = -3.962980738 + -1.191428572 t = -3.962980738 + -1.191428572 Combine like terms: -3.962980738 + -1.191428572 = -5.15440931 t = -5.15440931 Simplifying t = -5.15440931

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.771552166, -5.15440931}

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