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Svet_ta [14]
3 years ago
8

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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