5(2x+4)*3x-7=

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Solution for 5(2x+4)*3x-7= equation:


Simplifying
5(2x + 4) * 3x + -7 = 0

Reorder the terms:
5(4 + 2x) * 3x + -7 = 0

Reorder the terms for easier multiplication:
5 * 3x(4 + 2x) + -7 = 0

Multiply 5 * 3
15x(4 + 2x) + -7 = 0
(4 * 15x + 2x * 15x) + -7 = 0
(60x + 30x2) + -7 = 0

Reorder the terms:
-7 + 60x + 30x2 = 0

Solving
-7 + 60x + 30x2 = 0

Solving for variable 'x'.

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

Divide each side by '30'.
-0.2333333333 + 2x + x2 = 0.0

Move the constant term to the right:

Add '0.2333333333' to each side of the equation.
-0.2333333333 + 2x + 0.2333333333 + x2 = 0.0 + 0.2333333333

Reorder the terms:
-0.2333333333 + 0.2333333333 + 2x + x2 = 0.0 + 0.2333333333

Combine like terms: -0.2333333333 + 0.2333333333 = 0.0000000000
0.0000000000 + 2x + x2 = 0.0 + 0.2333333333
2x + x2 = 0.0 + 0.2333333333

Combine like terms: 0.0 + 0.2333333333 = 0.2333333333
2x + x2 = 0.2333333333

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 0.2333333333 + 1

Reorder the terms:
1 + 2x + x2 = 0.2333333333 + 1

Combine like terms: 0.2333333333 + 1 = 1.2333333333
1 + 2x + x2 = 1.2333333333

Factor a perfect square on the left side:
(x + 1)(x + 1) = 1.2333333333

Calculate the square root of the right side: 1.110555417

Break this problem into two subproblems by setting 
(x + 1) equal to 1.110555417 and -1.110555417.

Subproblem 1

x + 1 = 1.110555417 Simplifying x + 1 = 1.110555417 Reorder the terms: 1 + x = 1.110555417 Solving 1 + x = 1.110555417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.110555417 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.110555417 + -1 x = 1.110555417 + -1 Combine like terms: 1.110555417 + -1 = 0.110555417 x = 0.110555417 Simplifying x = 0.110555417

Subproblem 2

x + 1 = -1.110555417 Simplifying x + 1 = -1.110555417 Reorder the terms: 1 + x = -1.110555417 Solving 1 + x = -1.110555417 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.110555417 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.110555417 + -1 x = -1.110555417 + -1 Combine like terms: -1.110555417 + -1 = -2.110555417 x = -2.110555417 Simplifying x = -2.110555417

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.110555417, -2.110555417}

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