(4x+7)(4x+7)=10

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Solution for (4x+7)(4x+7)=10 equation:


Simplifying
(4x + 7)(4x + 7) = 10

Reorder the terms:
(7 + 4x)(4x + 7) = 10

Reorder the terms:
(7 + 4x)(7 + 4x) = 10

Multiply (7 + 4x) * (7 + 4x)
(7(7 + 4x) + 4x * (7 + 4x)) = 10
((7 * 7 + 4x * 7) + 4x * (7 + 4x)) = 10
((49 + 28x) + 4x * (7 + 4x)) = 10
(49 + 28x + (7 * 4x + 4x * 4x)) = 10
(49 + 28x + (28x + 16x2)) = 10

Combine like terms: 28x + 28x = 56x
(49 + 56x + 16x2) = 10

Solving
49 + 56x + 16x2 = 10

Solving for variable 'x'.

Reorder the terms:
49 + -10 + 56x + 16x2 = 10 + -10

Combine like terms: 49 + -10 = 39
39 + 56x + 16x2 = 10 + -10

Combine like terms: 10 + -10 = 0
39 + 56x + 16x2 = 0

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

Divide each side by '16'.
2.4375 + 3.5x + x2 = 0

Move the constant term to the right:

Add '-2.4375' to each side of the equation.
2.4375 + 3.5x + -2.4375 + x2 = 0 + -2.4375

Reorder the terms:
2.4375 + -2.4375 + 3.5x + x2 = 0 + -2.4375

Combine like terms: 2.4375 + -2.4375 = 0.0000
0.0000 + 3.5x + x2 = 0 + -2.4375
3.5x + x2 = 0 + -2.4375

Combine like terms: 0 + -2.4375 = -2.4375
3.5x + x2 = -2.4375

The x term is 3.5x.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5x + 3.0625 + x2 = -2.4375 + 3.0625

Reorder the terms:
3.0625 + 3.5x + x2 = -2.4375 + 3.0625

Combine like terms: -2.4375 + 3.0625 = 0.625
3.0625 + 3.5x + x2 = 0.625

Factor a perfect square on the left side:
(x + 1.75)(x + 1.75) = 0.625

Calculate the square root of the right side: 0.790569415

Break this problem into two subproblems by setting 
(x + 1.75) equal to 0.790569415 and -0.790569415.

Subproblem 1

x + 1.75 = 0.790569415 Simplifying x + 1.75 = 0.790569415 Reorder the terms: 1.75 + x = 0.790569415 Solving 1.75 + x = 0.790569415 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = 0.790569415 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = 0.790569415 + -1.75 x = 0.790569415 + -1.75 Combine like terms: 0.790569415 + -1.75 = -0.959430585 x = -0.959430585 Simplifying x = -0.959430585

Subproblem 2

x + 1.75 = -0.790569415 Simplifying x + 1.75 = -0.790569415 Reorder the terms: 1.75 + x = -0.790569415 Solving 1.75 + x = -0.790569415 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = -0.790569415 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = -0.790569415 + -1.75 x = -0.790569415 + -1.75 Combine like terms: -0.790569415 + -1.75 = -2.540569415 x = -2.540569415 Simplifying x = -2.540569415

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.959430585, -2.540569415}

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