(4r+3)(r-12)=

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Solution for (4r+3)(r-12)= equation:


Simplifying
(4r + 3)(r + -12) = 0

Reorder the terms:
(3 + 4r)(r + -12) = 0

Reorder the terms:
(3 + 4r)(-12 + r) = 0

Multiply (3 + 4r) * (-12 + r)
(3(-12 + r) + 4r * (-12 + r)) = 0
((-12 * 3 + r * 3) + 4r * (-12 + r)) = 0
((-36 + 3r) + 4r * (-12 + r)) = 0
(-36 + 3r + (-12 * 4r + r * 4r)) = 0
(-36 + 3r + (-48r + 4r2)) = 0

Combine like terms: 3r + -48r = -45r
(-36 + -45r + 4r2) = 0

Solving
-36 + -45r + 4r2 = 0

Solving for variable 'r'.

Factor a trinomial.
(-3 + -4r)(12 + -1r) = 0

Subproblem 1

Set the factor '(-3 + -4r)' equal to zero and attempt to solve: Simplifying -3 + -4r = 0 Solving -3 + -4r = 0 Move all terms containing r to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -4r = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -4r = 0 + 3 -4r = 0 + 3 Combine like terms: 0 + 3 = 3 -4r = 3 Divide each side by '-4'. r = -0.75 Simplifying r = -0.75

Subproblem 2

Set the factor '(12 + -1r)' equal to zero and attempt to solve: Simplifying 12 + -1r = 0 Solving 12 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -1r = 0 + -12 Combine like terms: 12 + -12 = 0 0 + -1r = 0 + -12 -1r = 0 + -12 Combine like terms: 0 + -12 = -12 -1r = -12 Divide each side by '-1'. r = 12 Simplifying r = 12

Solution

r = {-0.75, 12}

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