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

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


Simplifying
(-3w2 + 7w + -4) + (w2 + 2w + 6) = 0

Reorder the terms:
(-4 + 7w + -3w2) + (w2 + 2w + 6) = 0

Remove parenthesis around (-4 + 7w + -3w2)
-4 + 7w + -3w2 + (w2 + 2w + 6) = 0

Reorder the terms:
-4 + 7w + -3w2 + (6 + 2w + w2) = 0

Remove parenthesis around (6 + 2w + w2)
-4 + 7w + -3w2 + 6 + 2w + w2 = 0

Reorder the terms:
-4 + 6 + 7w + 2w + -3w2 + w2 = 0

Combine like terms: -4 + 6 = 2
2 + 7w + 2w + -3w2 + w2 = 0

Combine like terms: 7w + 2w = 9w
2 + 9w + -3w2 + w2 = 0

Combine like terms: -3w2 + w2 = -2w2
2 + 9w + -2w2 = 0

Solving
2 + 9w + -2w2 = 0

Solving for variable 'w'.

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-1 + -4.5w + w2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -4.5w + 1 + w2 = 0 + 1

Reorder the terms:
-1 + 1 + -4.5w + w2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -4.5w + w2 = 0 + 1
-4.5w + w2 = 0 + 1

Combine like terms: 0 + 1 = 1
-4.5w + w2 = 1

The w term is -4.5w.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5w + 5.0625 + w2 = 1 + 5.0625

Reorder the terms:
5.0625 + -4.5w + w2 = 1 + 5.0625

Combine like terms: 1 + 5.0625 = 6.0625
5.0625 + -4.5w + w2 = 6.0625

Factor a perfect square on the left side:
(w + -2.25)(w + -2.25) = 6.0625

Calculate the square root of the right side: 2.46221445

Break this problem into two subproblems by setting 
(w + -2.25) equal to 2.46221445 and -2.46221445.

Subproblem 1

w + -2.25 = 2.46221445 Simplifying w + -2.25 = 2.46221445 Reorder the terms: -2.25 + w = 2.46221445 Solving -2.25 + w = 2.46221445 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + w = 2.46221445 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + w = 2.46221445 + 2.25 w = 2.46221445 + 2.25 Combine like terms: 2.46221445 + 2.25 = 4.71221445 w = 4.71221445 Simplifying w = 4.71221445

Subproblem 2

w + -2.25 = -2.46221445 Simplifying w + -2.25 = -2.46221445 Reorder the terms: -2.25 + w = -2.46221445 Solving -2.25 + w = -2.46221445 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + w = -2.46221445 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + w = -2.46221445 + 2.25 w = -2.46221445 + 2.25 Combine like terms: -2.46221445 + 2.25 = -0.21221445 w = -0.21221445 Simplifying w = -0.21221445

Solution

The solution to the problem is based on the solutions from the subproblems. w = {4.71221445, -0.21221445}

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