(-3w^2+7w+7)-(7w^2+11w-4)=

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Solution for (-3w^2+7w+7)-(7w^2+11w-4)= equation:


Simplifying
(-3w2 + 7w + 7) + -1(7w2 + 11w + -4) = 0

Reorder the terms:
(7 + 7w + -3w2) + -1(7w2 + 11w + -4) = 0

Remove parenthesis around (7 + 7w + -3w2)
7 + 7w + -3w2 + -1(7w2 + 11w + -4) = 0

Reorder the terms:
7 + 7w + -3w2 + -1(-4 + 11w + 7w2) = 0
7 + 7w + -3w2 + (-4 * -1 + 11w * -1 + 7w2 * -1) = 0
7 + 7w + -3w2 + (4 + -11w + -7w2) = 0

Reorder the terms:
7 + 4 + 7w + -11w + -3w2 + -7w2 = 0

Combine like terms: 7 + 4 = 11
11 + 7w + -11w + -3w2 + -7w2 = 0

Combine like terms: 7w + -11w = -4w
11 + -4w + -3w2 + -7w2 = 0

Combine like terms: -3w2 + -7w2 = -10w2
11 + -4w + -10w2 = 0

Solving
11 + -4w + -10w2 = 0

Solving for variable 'w'.

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
-1.1 + 0.4w + w2 = 0.0

Move the constant term to the right:

Add '1.1' to each side of the equation.
-1.1 + 0.4w + 1.1 + w2 = 0.0 + 1.1

Reorder the terms:
-1.1 + 1.1 + 0.4w + w2 = 0.0 + 1.1

Combine like terms: -1.1 + 1.1 = 0.0
0.0 + 0.4w + w2 = 0.0 + 1.1
0.4w + w2 = 0.0 + 1.1

Combine like terms: 0.0 + 1.1 = 1.1
0.4w + w2 = 1.1

The w term is 0.4w.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4w + 0.04 + w2 = 1.1 + 0.04

Reorder the terms:
0.04 + 0.4w + w2 = 1.1 + 0.04

Combine like terms: 1.1 + 0.04 = 1.14
0.04 + 0.4w + w2 = 1.14

Factor a perfect square on the left side:
(w + 0.2)(w + 0.2) = 1.14

Calculate the square root of the right side: 1.067707825

Break this problem into two subproblems by setting 
(w + 0.2) equal to 1.067707825 and -1.067707825.

Subproblem 1

w + 0.2 = 1.067707825 Simplifying w + 0.2 = 1.067707825 Reorder the terms: 0.2 + w = 1.067707825 Solving 0.2 + w = 1.067707825 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + w = 1.067707825 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + w = 1.067707825 + -0.2 w = 1.067707825 + -0.2 Combine like terms: 1.067707825 + -0.2 = 0.867707825 w = 0.867707825 Simplifying w = 0.867707825

Subproblem 2

w + 0.2 = -1.067707825 Simplifying w + 0.2 = -1.067707825 Reorder the terms: 0.2 + w = -1.067707825 Solving 0.2 + w = -1.067707825 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + w = -1.067707825 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + w = -1.067707825 + -0.2 w = -1.067707825 + -0.2 Combine like terms: -1.067707825 + -0.2 = -1.267707825 w = -1.267707825 Simplifying w = -1.267707825

Solution

The solution to the problem is based on the solutions from the subproblems. w = {0.867707825, -1.267707825}

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