r^2+19rs+90s^2=(r+10)(r+9s)

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Solution for r^2+19rs+90s^2=(r+10)(r+9s) equation:


Simplifying
r2 + 19rs + 90s2 = (r + 10)(r + 9s)

Reorder the terms:
19rs + r2 + 90s2 = (r + 10)(r + 9s)

Reorder the terms:
19rs + r2 + 90s2 = (10 + r)(r + 9s)

Multiply (10 + r) * (r + 9s)
19rs + r2 + 90s2 = (10(r + 9s) + r(r + 9s))
19rs + r2 + 90s2 = ((r * 10 + 9s * 10) + r(r + 9s))
19rs + r2 + 90s2 = ((10r + 90s) + r(r + 9s))
19rs + r2 + 90s2 = (10r + 90s + (r * r + 9s * r))

Reorder the terms:
19rs + r2 + 90s2 = (10r + 90s + (9rs + r2))
19rs + r2 + 90s2 = (10r + 90s + (9rs + r2))

Reorder the terms:
19rs + r2 + 90s2 = (10r + 9rs + r2 + 90s)
19rs + r2 + 90s2 = (10r + 9rs + r2 + 90s)

Add '-1r2' to each side of the equation.
19rs + r2 + -1r2 + 90s2 = 10r + 9rs + r2 + -1r2 + 90s

Combine like terms: r2 + -1r2 = 0
19rs + 0 + 90s2 = 10r + 9rs + r2 + -1r2 + 90s
19rs + 90s2 = 10r + 9rs + r2 + -1r2 + 90s

Combine like terms: r2 + -1r2 = 0
19rs + 90s2 = 10r + 9rs + 0 + 90s
19rs + 90s2 = 10r + 9rs + 90s

Solving
19rs + 90s2 = 10r + 9rs + 90s

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-10r' to each side of the equation.
19rs + -10r + 90s2 = 10r + 9rs + -10r + 90s

Reorder the terms:
-10r + 19rs + 90s2 = 10r + 9rs + -10r + 90s

Reorder the terms:
-10r + 19rs + 90s2 = 10r + -10r + 9rs + 90s

Combine like terms: 10r + -10r = 0
-10r + 19rs + 90s2 = 0 + 9rs + 90s
-10r + 19rs + 90s2 = 9rs + 90s

Add '-9rs' to each side of the equation.
-10r + 19rs + -9rs + 90s2 = 9rs + -9rs + 90s

Combine like terms: 19rs + -9rs = 10rs
-10r + 10rs + 90s2 = 9rs + -9rs + 90s

Combine like terms: 9rs + -9rs = 0
-10r + 10rs + 90s2 = 0 + 90s
-10r + 10rs + 90s2 = 90s

Add '-90s2' to each side of the equation.
-10r + 10rs + 90s2 + -90s2 = 90s + -90s2

Combine like terms: 90s2 + -90s2 = 0
-10r + 10rs + 0 = 90s + -90s2
-10r + 10rs = 90s + -90s2

Reorder the terms:
-10r + 10rs + -90s + 90s2 = 90s + -90s + -90s2 + 90s2

Combine like terms: 90s + -90s = 0
-10r + 10rs + -90s + 90s2 = 0 + -90s2 + 90s2
-10r + 10rs + -90s + 90s2 = -90s2 + 90s2

Combine like terms: -90s2 + 90s2 = 0
-10r + 10rs + -90s + 90s2 = 0

Factor out the Greatest Common Factor (GCF), '10'.
10(-1r + rs + -9s + 9s2) = 0

Ignore the factor 10.

Subproblem 1

Set the factor '(-1r + rs + -9s + 9s2)' equal to zero and attempt to solve: Simplifying -1r + rs + -9s + 9s2 = 0 Solving -1r + rs + -9s + 9s2 = 0 Move all terms containing r to the left, all other terms to the right. Add '9s' to each side of the equation. -1r + rs + -9s + 9s + 9s2 = 0 + 9s Combine like terms: -9s + 9s = 0 -1r + rs + 0 + 9s2 = 0 + 9s -1r + rs + 9s2 = 0 + 9s Remove the zero: -1r + rs + 9s2 = 9s Add '-9s2' to each side of the equation. -1r + rs + 9s2 + -9s2 = 9s + -9s2 Combine like terms: 9s2 + -9s2 = 0 -1r + rs + 0 = 9s + -9s2 -1r + rs = 9s + -9s2 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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