bhhzd3037 bhhzd3037

02-10-2017
Mathematics

contestada

Multiplying by a conjugate gives a rational number because (a + b)(a -
b.= _____.

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kritter1 kritter1

02-10-2017

Use foil.

(a+b)(a–b)
a^2 -ab +ab -b^2
a^2 – b^2

Hope I helped :)

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