(680-20x)(70+5x)=0

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Solution for (680-20x)(70+5x)=0 equation:


Simplifying
(680 + -20x)(70 + 5x) = 0

Multiply (680 + -20x) * (70 + 5x)
(680(70 + 5x) + -20x * (70 + 5x)) = 0
((70 * 680 + 5x * 680) + -20x * (70 + 5x)) = 0
((47600 + 3400x) + -20x * (70 + 5x)) = 0
(47600 + 3400x + (70 * -20x + 5x * -20x)) = 0
(47600 + 3400x + (-1400x + -100x2)) = 0

Combine like terms: 3400x + -1400x = 2000x
(47600 + 2000x + -100x2) = 0

Solving
47600 + 2000x + -100x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '100'.
100(476 + 20x + -1x2) = 0

Factor a trinomial.
100((34 + -1x)(14 + x)) = 0

Ignore the factor 100.

Subproblem 1

Set the factor '(34 + -1x)' equal to zero and attempt to solve: Simplifying 34 + -1x = 0 Solving 34 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-34' to each side of the equation. 34 + -34 + -1x = 0 + -34 Combine like terms: 34 + -34 = 0 0 + -1x = 0 + -34 -1x = 0 + -34 Combine like terms: 0 + -34 = -34 -1x = -34 Divide each side by '-1'. x = 34 Simplifying x = 34

Subproblem 2

Set the factor '(14 + x)' equal to zero and attempt to solve: Simplifying 14 + x = 0 Solving 14 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + -14 + x = 0 + -14 Combine like terms: 14 + -14 = 0 0 + x = 0 + -14 x = 0 + -14 Combine like terms: 0 + -14 = -14 x = -14 Simplifying x = -14

Solution

x = {34, -14}

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