- #1
alpha01
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Homework Statement
I don't understand why cross multiplying (a+1) with a(a+1) = (a+1)^2.
Similary on the RHS, I don't understand why cross multiplying (a-1) with a(a-1) = (a-1)^2.
Homework Equations
Factorizing to next step:
[tex]\frac{a + 1}{a(a - 1)}[/tex] _ [tex] \frac{a-1}{a(a + 1)}[/tex]
gives:
[tex]\frac{(a + 1)^2}{a(a - 1)(a + 1)}[/tex] _ [tex] \frac{(a - 1)^2}{a(a - 1)(a + 1)}[/tex]
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