4r^2-9r=9

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Solution for 4r^2-9r=9 equation:


Simplifying
4r2 + -9r = 9

Reorder the terms:
-9r + 4r2 = 9

Solving
-9r + 4r2 = 9

Solving for variable 'r'.

Reorder the terms:
-9 + -9r + 4r2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + -9r + 4r2 = 0

Factor a trinomial.
(-3 + -4r)(3 + -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 '(3 + -1r)' equal to zero and attempt to solve: Simplifying 3 + -1r = 0 Solving 3 + -1r = 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 + -1r = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1r = 0 + -3 -1r = 0 + -3 Combine like terms: 0 + -3 = -3 -1r = -3 Divide each side by '-1'. r = 3 Simplifying r = 3

Solution

r = {-0.75, 3}

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