3 years ago

Perform the indicated operation. (a + b)(a - b)

Mathematics

1 answer:

FromTheMoon [43]3 years ago

7 0

a^ - b^ a squared minus b squared.

use distributive property of multiplication. FOIL (first, outside, inside, last)

a *a = a^ - b*a= ab (or ba) + b*a = ba (or ab) - b*b= b^

a squared - ab +ab - b squared

Negative ab and positive ab = 0 therefore you are left with

a^ - b^

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