(x+3)(9x+7)=

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Solution for (x+3)(9x+7)= equation:


Simplifying
(x + 3)(9x + 7) = 0

Reorder the terms:
(3 + x)(9x + 7) = 0

Reorder the terms:
(3 + x)(7 + 9x) = 0

Multiply (3 + x) * (7 + 9x)
(3(7 + 9x) + x(7 + 9x)) = 0
((7 * 3 + 9x * 3) + x(7 + 9x)) = 0
((21 + 27x) + x(7 + 9x)) = 0
(21 + 27x + (7 * x + 9x * x)) = 0
(21 + 27x + (7x + 9x2)) = 0

Combine like terms: 27x + 7x = 34x
(21 + 34x + 9x2) = 0

Solving
21 + 34x + 9x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(3 + x)(7 + 9x) = 0

Subproblem 1

Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3

Subproblem 2

Set the factor '(7 + 9x)' equal to zero and attempt to solve: Simplifying 7 + 9x = 0 Solving 7 + 9x = 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 + 9x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 9x = 0 + -7 9x = 0 + -7 Combine like terms: 0 + -7 = -7 9x = -7 Divide each side by '9'. x = -0.7777777778 Simplifying x = -0.7777777778

Solution

x = {-3, -0.7777777778}

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