(7+x)(4x+5)=0

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Solution for (7+x)(4x+5)=0 equation:


Simplifying
(7 + x)(4x + 5) = 0

Reorder the terms:
(7 + x)(5 + 4x) = 0

Multiply (7 + x) * (5 + 4x)
(7(5 + 4x) + x(5 + 4x)) = 0
((5 * 7 + 4x * 7) + x(5 + 4x)) = 0
((35 + 28x) + x(5 + 4x)) = 0
(35 + 28x + (5 * x + 4x * x)) = 0
(35 + 28x + (5x + 4x2)) = 0

Combine like terms: 28x + 5x = 33x
(35 + 33x + 4x2) = 0

Solving
35 + 33x + 4x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(7 + x)(5 + 4x) = 0

Subproblem 1

Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 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 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7

Subproblem 2

Set the factor '(5 + 4x)' equal to zero and attempt to solve: Simplifying 5 + 4x = 0 Solving 5 + 4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 4x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 4x = 0 + -5 4x = 0 + -5 Combine like terms: 0 + -5 = -5 4x = -5 Divide each side by '4'. x = -1.25 Simplifying x = -1.25

Solution

x = {-7, -1.25}

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