8x(4x+5)=1000

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Solution for 8x(4x+5)=1000 equation:


Simplifying
8x(4x + 5) = 1000

Reorder the terms:
8x(5 + 4x) = 1000
(5 * 8x + 4x * 8x) = 1000
(40x + 32x2) = 1000

Solving
40x + 32x2 = 1000

Solving for variable 'x'.

Reorder the terms:
-1000 + 40x + 32x2 = 1000 + -1000

Combine like terms: 1000 + -1000 = 0
-1000 + 40x + 32x2 = 0

Factor out the Greatest Common Factor (GCF), '8'.
8(-125 + 5x + 4x2) = 0

Factor a trinomial.
8((-25 + -4x)(5 + -1x)) = 0

Ignore the factor 8.

Subproblem 1

Set the factor '(-25 + -4x)' equal to zero and attempt to solve: Simplifying -25 + -4x = 0 Solving -25 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + -4x = 0 + 25 Combine like terms: -25 + 25 = 0 0 + -4x = 0 + 25 -4x = 0 + 25 Combine like terms: 0 + 25 = 25 -4x = 25 Divide each side by '-4'. x = -6.25 Simplifying x = -6.25

Subproblem 2

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 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 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {-6.25, 5}

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