4w^2+7w=3

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Solution for 4w^2+7w=3 equation:


Simplifying
4w2 + 7w = 3

Reorder the terms:
7w + 4w2 = 3

Solving
7w + 4w2 = 3

Solving for variable 'w'.

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

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

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

Divide each side by '4'.
-0.75 + 1.75w + w2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + 1.75w + 0.75 + w2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + 1.75w + w2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + 1.75w + w2 = 0 + 0.75
1.75w + w2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
1.75w + w2 = 0.75

The w term is 1.75w.  Take half its coefficient (0.875).
Square it (0.765625) and add it to both sides.

Add '0.765625' to each side of the equation.
1.75w + 0.765625 + w2 = 0.75 + 0.765625

Reorder the terms:
0.765625 + 1.75w + w2 = 0.75 + 0.765625

Combine like terms: 0.75 + 0.765625 = 1.515625
0.765625 + 1.75w + w2 = 1.515625

Factor a perfect square on the left side:
(w + 0.875)(w + 0.875) = 1.515625

Calculate the square root of the right side: 1.231107225

Break this problem into two subproblems by setting 
(w + 0.875) equal to 1.231107225 and -1.231107225.

Subproblem 1

w + 0.875 = 1.231107225 Simplifying w + 0.875 = 1.231107225 Reorder the terms: 0.875 + w = 1.231107225 Solving 0.875 + w = 1.231107225 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + w = 1.231107225 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + w = 1.231107225 + -0.875 w = 1.231107225 + -0.875 Combine like terms: 1.231107225 + -0.875 = 0.356107225 w = 0.356107225 Simplifying w = 0.356107225

Subproblem 2

w + 0.875 = -1.231107225 Simplifying w + 0.875 = -1.231107225 Reorder the terms: 0.875 + w = -1.231107225 Solving 0.875 + w = -1.231107225 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.875' to each side of the equation. 0.875 + -0.875 + w = -1.231107225 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + w = -1.231107225 + -0.875 w = -1.231107225 + -0.875 Combine like terms: -1.231107225 + -0.875 = -2.106107225 w = -2.106107225 Simplifying w = -2.106107225

Solution

The solution to the problem is based on the solutions from the subproblems. w = {0.356107225, -2.106107225}

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