(3x+5)(3x+5)=7

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Solution for (3x+5)(3x+5)=7 equation:


Simplifying
(3x + 5)(3x + 5) = 7

Reorder the terms:
(5 + 3x)(3x + 5) = 7

Reorder the terms:
(5 + 3x)(5 + 3x) = 7

Multiply (5 + 3x) * (5 + 3x)
(5(5 + 3x) + 3x * (5 + 3x)) = 7
((5 * 5 + 3x * 5) + 3x * (5 + 3x)) = 7
((25 + 15x) + 3x * (5 + 3x)) = 7
(25 + 15x + (5 * 3x + 3x * 3x)) = 7
(25 + 15x + (15x + 9x2)) = 7

Combine like terms: 15x + 15x = 30x
(25 + 30x + 9x2) = 7

Solving
25 + 30x + 9x2 = 7

Solving for variable 'x'.

Reorder the terms:
25 + -7 + 30x + 9x2 = 7 + -7

Combine like terms: 25 + -7 = 18
18 + 30x + 9x2 = 7 + -7

Combine like terms: 7 + -7 = 0
18 + 30x + 9x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(6 + 10x + 3x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(6 + 10x + 3x2)' equal to zero and attempt to solve: Simplifying 6 + 10x + 3x2 = 0 Solving 6 + 10x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 2 + 3.333333333x + x2 = 0 Move the constant term to the right: Add '-2' to each side of the equation. 2 + 3.333333333x + -2 + x2 = 0 + -2 Reorder the terms: 2 + -2 + 3.333333333x + x2 = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3.333333333x + x2 = 0 + -2 3.333333333x + x2 = 0 + -2 Combine like terms: 0 + -2 = -2 3.333333333x + x2 = -2 The x term is 3.333333333x. Take half its coefficient (1.666666667). Square it (2.777777779) and add it to both sides. Add '2.777777779' to each side of the equation. 3.333333333x + 2.777777779 + x2 = -2 + 2.777777779 Reorder the terms: 2.777777779 + 3.333333333x + x2 = -2 + 2.777777779 Combine like terms: -2 + 2.777777779 = 0.777777779 2.777777779 + 3.333333333x + x2 = 0.777777779 Factor a perfect square on the left side: (x + 1.666666667)(x + 1.666666667) = 0.777777779 Calculate the square root of the right side: 0.881917104 Break this problem into two subproblems by setting (x + 1.666666667) equal to 0.881917104 and -0.881917104.

Subproblem 1

x + 1.666666667 = 0.881917104 Simplifying x + 1.666666667 = 0.881917104 Reorder the terms: 1.666666667 + x = 0.881917104 Solving 1.666666667 + x = 0.881917104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + x = 0.881917104 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + x = 0.881917104 + -1.666666667 x = 0.881917104 + -1.666666667 Combine like terms: 0.881917104 + -1.666666667 = -0.784749563 x = -0.784749563 Simplifying x = -0.784749563

Subproblem 2

x + 1.666666667 = -0.881917104 Simplifying x + 1.666666667 = -0.881917104 Reorder the terms: 1.666666667 + x = -0.881917104 Solving 1.666666667 + x = -0.881917104 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.666666667' to each side of the equation. 1.666666667 + -1.666666667 + x = -0.881917104 + -1.666666667 Combine like terms: 1.666666667 + -1.666666667 = 0.000000000 0.000000000 + x = -0.881917104 + -1.666666667 x = -0.881917104 + -1.666666667 Combine like terms: -0.881917104 + -1.666666667 = -2.548583771 x = -2.548583771 Simplifying x = -2.548583771

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.784749563, -2.548583771}

Solution

x = {-0.784749563, -2.548583771}

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