1r^2+9=10r

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Solution for 1r^2+9=10r equation:


Simplifying
1r2 + 9 = 10r

Reorder the terms:
9 + 1r2 = 10r

Solving
9 + 1r2 = 10r

Solving for variable 'r'.

Reorder the terms:
9 + -10r + 1r2 = 10r + -10r

Combine like terms: 10r + -10r = 0
9 + -10r + 1r2 = 0

Factor a trinomial.
(1 + -1r)(9 + -1r) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(9 + -1r)' equal to zero and attempt to solve: Simplifying 9 + -1r = 0 Solving 9 + -1r = 0 Move all terms containing r to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1r = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1r = 0 + -9 -1r = 0 + -9 Combine like terms: 0 + -9 = -9 -1r = -9 Divide each side by '-1'. r = 9 Simplifying r = 9

Solution

r = {1, 9}

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