# Solving One Equation with Two Unknowns

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Problem: Solve for the variables 'a' & 'b' (only the positive solutions) where,

(a - b) x (a + b) = 9x5

This is my work..is it correct?

2a

= a2 + ab -ab - b2 = 45

a2 - b2 + b2 = 45 = b2

a2 = 45 + b2

a2 + a2 - b2 = 45 - b2 + b2

a2 - b2 = 45

7squared = 49

-2squared = -4

49 + -4 =45

a = 7squared, b =

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Problem: Solve for the ...

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