4t^2+7t+2=0

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Solution for 4t^2+7t+2=0 equation:


Simplifying
4t2 + 7t + 2 = 0

Reorder the terms:
2 + 7t + 4t2 = 0

Solving
2 + 7t + 4t2 = 0

Solving for variable 't'.

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

Divide each side by '4'.
0.5 + 1.75t + t2 = 0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + 1.75t + -0.5 + t2 = 0 + -0.5

Reorder the terms:
0.5 + -0.5 + 1.75t + t2 = 0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + 1.75t + t2 = 0 + -0.5
1.75t + t2 = 0 + -0.5

Combine like terms: 0 + -0.5 = -0.5
1.75t + t2 = -0.5

The t term is 1.75t.  Take half its coefficient (0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
1.75t + 0.765625 + t2 = -0.5 + 0.765625

Reorder the terms:
0.765625 + 1.75t + t2 = -0.5 + 0.765625

Combine like terms: -0.5 + 0.765625 = 0.265625
0.765625 + 1.75t + t2 = 0.265625

Factor a perfect square on the left side:
(t + 0.875)(t + 0.875) = 0.265625

Calculate the square root of the right side: 0.515388203

Break this problem into two subproblems by setting 
(t + 0.875) equal to 0.515388203 and -0.515388203.

Subproblem 1

t + 0.875 = 0.515388203 Simplifying t + 0.875 = 0.515388203 Reorder the terms: 0.875 + t = 0.515388203 Solving 0.875 + t = 0.515388203 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + t = 0.515388203 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + t = 0.515388203 + -0.875 t = 0.515388203 + -0.875 Combine like terms: 0.515388203 + -0.875 = -0.359611797 t = -0.359611797 Simplifying t = -0.359611797

Subproblem 2

t + 0.875 = -0.515388203 Simplifying t + 0.875 = -0.515388203 Reorder the terms: 0.875 + t = -0.515388203 Solving 0.875 + t = -0.515388203 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + t = -0.515388203 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + t = -0.515388203 + -0.875 t = -0.515388203 + -0.875 Combine like terms: -0.515388203 + -0.875 = -1.390388203 t = -1.390388203 Simplifying t = -1.390388203

Solution

The solution to the problem is based on the solutions from the subproblems. t = {-0.359611797, -1.390388203}

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