0=-.7t^2+14t-140

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Solution for 0=-.7t^2+14t-140 equation:


Simplifying
0 = -0.7t2 + 14t + -140

Reorder the terms:
0 = -140 + 14t + -0.7t2

Solving
0 = -140 + 14t + -0.7t2

Solving for variable 't'.

Combine like terms: 0 + 140 = 140
140 + -14t + 0.7t2 = -140 + 14t + -0.7t2 + 140 + -14t + 0.7t2

Reorder the terms:
140 + -14t + 0.7t2 = -140 + 140 + 14t + -14t + -0.7t2 + 0.7t2

Combine like terms: -140 + 140 = 0
140 + -14t + 0.7t2 = 0 + 14t + -14t + -0.7t2 + 0.7t2
140 + -14t + 0.7t2 = 14t + -14t + -0.7t2 + 0.7t2

Combine like terms: 14t + -14t = 0
140 + -14t + 0.7t2 = 0 + -0.7t2 + 0.7t2
140 + -14t + 0.7t2 = -0.7t2 + 0.7t2

Combine like terms: -0.7t2 + 0.7t2 = 0.0
140 + -14t + 0.7t2 = 0.0

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

Divide each side by '0.7'.
200 + -20t + t2 = 0

Move the constant term to the right:

Add '-200' to each side of the equation.
200 + -20t + -200 + t2 = 0 + -200

Reorder the terms:
200 + -200 + -20t + t2 = 0 + -200

Combine like terms: 200 + -200 = 0
0 + -20t + t2 = 0 + -200
-20t + t2 = 0 + -200

Combine like terms: 0 + -200 = -200
-20t + t2 = -200

The t term is -20t.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20t + 100 + t2 = -200 + 100

Reorder the terms:
100 + -20t + t2 = -200 + 100

Combine like terms: -200 + 100 = -100
100 + -20t + t2 = -100

Factor a perfect square on the left side:
(t + -10)(t + -10) = -100

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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