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

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


Simplifying
(3x + 5)(5 + -7x) = 0

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

Multiply (5 + 3x) * (5 + -7x)
(5(5 + -7x) + 3x * (5 + -7x)) = 0
((5 * 5 + -7x * 5) + 3x * (5 + -7x)) = 0
((25 + -35x) + 3x * (5 + -7x)) = 0
(25 + -35x + (5 * 3x + -7x * 3x)) = 0
(25 + -35x + (15x + -21x2)) = 0

Combine like terms: -35x + 15x = -20x
(25 + -20x + -21x2) = 0

Solving
25 + -20x + -21x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(5 + -7x)(5 + 3x) = 0

Subproblem 1

Set the factor '(5 + -7x)' equal to zero and attempt to solve: Simplifying 5 + -7x = 0 Solving 5 + -7x = 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 + -7x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -7x = 0 + -5 -7x = 0 + -5 Combine like terms: 0 + -5 = -5 -7x = -5 Divide each side by '-7'. x = 0.7142857143 Simplifying x = 0.7142857143

Subproblem 2

Set the factor '(5 + 3x)' equal to zero and attempt to solve: Simplifying 5 + 3x = 0 Solving 5 + 3x = 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 + 3x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 3x = 0 + -5 3x = 0 + -5 Combine like terms: 0 + -5 = -5 3x = -5 Divide each side by '3'. x = -1.666666667 Simplifying x = -1.666666667

Solution

x = {0.7142857143, -1.666666667}

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