(-4t^2+3t-6)+(t^2+2t+7)=

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Solution for (-4t^2+3t-6)+(t^2+2t+7)= equation:


Simplifying
(-4t2 + 3t + -6) + (t2 + 2t + 7) = 0

Reorder the terms:
(-6 + 3t + -4t2) + (t2 + 2t + 7) = 0

Remove parenthesis around (-6 + 3t + -4t2)
-6 + 3t + -4t2 + (t2 + 2t + 7) = 0

Reorder the terms:
-6 + 3t + -4t2 + (7 + 2t + t2) = 0

Remove parenthesis around (7 + 2t + t2)
-6 + 3t + -4t2 + 7 + 2t + t2 = 0

Reorder the terms:
-6 + 7 + 3t + 2t + -4t2 + t2 = 0

Combine like terms: -6 + 7 = 1
1 + 3t + 2t + -4t2 + t2 = 0

Combine like terms: 3t + 2t = 5t
1 + 5t + -4t2 + t2 = 0

Combine like terms: -4t2 + t2 = -3t2
1 + 5t + -3t2 = 0

Solving
1 + 5t + -3t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-0.3333333333 + -1.666666667t + t2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + -1.666666667t + 0.3333333333 + t2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + -1.666666667t + t2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + -1.666666667t + t2 = 0 + 0.3333333333
-1.666666667t + t2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
-1.666666667t + t2 = 0.3333333333

The t term is -1.666666667t.  Take half its coefficient (-0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
-1.666666667t + 0.6944444447 + t2 = 0.3333333333 + 0.6944444447

Reorder the terms:
0.6944444447 + -1.666666667t + t2 = 0.3333333333 + 0.6944444447

Combine like terms: 0.3333333333 + 0.6944444447 = 1.027777778
0.6944444447 + -1.666666667t + t2 = 1.027777778

Factor a perfect square on the left side:
(t + -0.8333333335)(t + -0.8333333335) = 1.027777778

Calculate the square root of the right side: 1.013793755

Break this problem into two subproblems by setting 
(t + -0.8333333335) equal to 1.013793755 and -1.013793755.

Subproblem 1

t + -0.8333333335 = 1.013793755 Simplifying t + -0.8333333335 = 1.013793755 Reorder the terms: -0.8333333335 + t = 1.013793755 Solving -0.8333333335 + t = 1.013793755 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + t = 1.013793755 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + t = 1.013793755 + 0.8333333335 t = 1.013793755 + 0.8333333335 Combine like terms: 1.013793755 + 0.8333333335 = 1.8471270885 t = 1.8471270885 Simplifying t = 1.8471270885

Subproblem 2

t + -0.8333333335 = -1.013793755 Simplifying t + -0.8333333335 = -1.013793755 Reorder the terms: -0.8333333335 + t = -1.013793755 Solving -0.8333333335 + t = -1.013793755 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.8333333335' to each side of the equation. -0.8333333335 + 0.8333333335 + t = -1.013793755 + 0.8333333335 Combine like terms: -0.8333333335 + 0.8333333335 = 0.0000000000 0.0000000000 + t = -1.013793755 + 0.8333333335 t = -1.013793755 + 0.8333333335 Combine like terms: -1.013793755 + 0.8333333335 = -0.1804604215 t = -0.1804604215 Simplifying t = -0.1804604215

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.8471270885, -0.1804604215}

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