# Algebra

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Solve. ã9x+81=x+5 this is my answer:x=35+3ã61/2,35-3ã61/2

is this correct.

• Algebra -

√(9x+81) = x+5
square both sides
9x+81 = x^2 + 10x + 25
x^2 + x - 56 = 0
(x+8)(x-7) = 0
x = -8 or x = 7

A quick check will show that only x=7 is a valid answer

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