1=-4.9t^2+3.5t+10

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Solution for 1=-4.9t^2+3.5t+10 equation:


Simplifying
1 = -4.9t2 + 3.5t + 10

Reorder the terms:
1 = 10 + 3.5t + -4.9t2

Solving
1 = 10 + 3.5t + -4.9t2

Solving for variable 't'.

Combine like terms: 1 + -10 = -9
-9 + -3.5t + 4.9t2 = 10 + 3.5t + -4.9t2 + -10 + -3.5t + 4.9t2

Reorder the terms:
-9 + -3.5t + 4.9t2 = 10 + -10 + 3.5t + -3.5t + -4.9t2 + 4.9t2

Combine like terms: 10 + -10 = 0
-9 + -3.5t + 4.9t2 = 0 + 3.5t + -3.5t + -4.9t2 + 4.9t2
-9 + -3.5t + 4.9t2 = 3.5t + -3.5t + -4.9t2 + 4.9t2

Combine like terms: 3.5t + -3.5t = 0.0
-9 + -3.5t + 4.9t2 = 0.0 + -4.9t2 + 4.9t2
-9 + -3.5t + 4.9t2 = -4.9t2 + 4.9t2

Combine like terms: -4.9t2 + 4.9t2 = 0.0
-9 + -3.5t + 4.9t2 = 0.0

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

Divide each side by '4.9'.
-1.836734694 + -0.7142857143t + t2 = 0

Move the constant term to the right:

Add '1.836734694' to each side of the equation.
-1.836734694 + -0.7142857143t + 1.836734694 + t2 = 0 + 1.836734694

Reorder the terms:
-1.836734694 + 1.836734694 + -0.7142857143t + t2 = 0 + 1.836734694

Combine like terms: -1.836734694 + 1.836734694 = 0.000000000
0.000000000 + -0.7142857143t + t2 = 0 + 1.836734694
-0.7142857143t + t2 = 0 + 1.836734694

Combine like terms: 0 + 1.836734694 = 1.836734694
-0.7142857143t + t2 = 1.836734694

The t term is -0.7142857143t.  Take half its coefficient (-0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
-0.7142857143t + 0.1275510204 + t2 = 1.836734694 + 0.1275510204

Reorder the terms:
0.1275510204 + -0.7142857143t + t2 = 1.836734694 + 0.1275510204

Combine like terms: 1.836734694 + 0.1275510204 = 1.9642857144
0.1275510204 + -0.7142857143t + t2 = 1.9642857144

Factor a perfect square on the left side:
(t + -0.3571428572)(t + -0.3571428572) = 1.9642857144

Calculate the square root of the right side: 1.401529776

Break this problem into two subproblems by setting 
(t + -0.3571428572) equal to 1.401529776 and -1.401529776.

Subproblem 1

t + -0.3571428572 = 1.401529776 Simplifying t + -0.3571428572 = 1.401529776 Reorder the terms: -0.3571428572 + t = 1.401529776 Solving -0.3571428572 + t = 1.401529776 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + t = 1.401529776 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + t = 1.401529776 + 0.3571428572 t = 1.401529776 + 0.3571428572 Combine like terms: 1.401529776 + 0.3571428572 = 1.7586726332 t = 1.7586726332 Simplifying t = 1.7586726332

Subproblem 2

t + -0.3571428572 = -1.401529776 Simplifying t + -0.3571428572 = -1.401529776 Reorder the terms: -0.3571428572 + t = -1.401529776 Solving -0.3571428572 + t = -1.401529776 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + t = -1.401529776 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + t = -1.401529776 + 0.3571428572 t = -1.401529776 + 0.3571428572 Combine like terms: -1.401529776 + 0.3571428572 = -1.0443869188 t = -1.0443869188 Simplifying t = -1.0443869188

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.7586726332, -1.0443869188}

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