(4x+1)(4x+1)+9(4x+1)=-18

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Solution for (4x+1)(4x+1)+9(4x+1)=-18 equation:


Simplifying
(4x + 1)(4x + 1) + 9(4x + 1) = -18

Reorder the terms:
(1 + 4x)(4x + 1) + 9(4x + 1) = -18

Reorder the terms:
(1 + 4x)(1 + 4x) + 9(4x + 1) = -18

Multiply (1 + 4x) * (1 + 4x)
(1(1 + 4x) + 4x * (1 + 4x)) + 9(4x + 1) = -18
((1 * 1 + 4x * 1) + 4x * (1 + 4x)) + 9(4x + 1) = -18
((1 + 4x) + 4x * (1 + 4x)) + 9(4x + 1) = -18
(1 + 4x + (1 * 4x + 4x * 4x)) + 9(4x + 1) = -18
(1 + 4x + (4x + 16x2)) + 9(4x + 1) = -18

Combine like terms: 4x + 4x = 8x
(1 + 8x + 16x2) + 9(4x + 1) = -18

Reorder the terms:
1 + 8x + 16x2 + 9(1 + 4x) = -18
1 + 8x + 16x2 + (1 * 9 + 4x * 9) = -18
1 + 8x + 16x2 + (9 + 36x) = -18

Reorder the terms:
1 + 9 + 8x + 36x + 16x2 = -18

Combine like terms: 1 + 9 = 10
10 + 8x + 36x + 16x2 = -18

Combine like terms: 8x + 36x = 44x
10 + 44x + 16x2 = -18

Solving
10 + 44x + 16x2 = -18

Solving for variable 'x'.

Reorder the terms:
10 + 18 + 44x + 16x2 = -18 + 18

Combine like terms: 10 + 18 = 28
28 + 44x + 16x2 = -18 + 18

Combine like terms: -18 + 18 = 0
28 + 44x + 16x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(7 + 11x + 4x2) = 0

Factor a trinomial.
4((7 + 4x)(1 + x)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(7 + 4x)' equal to zero and attempt to solve: Simplifying 7 + 4x = 0 Solving 7 + 4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 4x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 4x = 0 + -7 4x = 0 + -7 Combine like terms: 0 + -7 = -7 4x = -7 Divide each side by '4'. x = -1.75 Simplifying x = -1.75

Subproblem 2

Set the factor '(1 + x)' equal to zero and attempt to solve: Simplifying 1 + x = 0 Solving 1 + x = 0 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 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + x = 0 + -1 x = 0 + -1 Combine like terms: 0 + -1 = -1 x = -1 Simplifying x = -1

Solution

x = {-1.75, -1}

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