how to solve (l+m)²-(l-m)² ?
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Answered by
2
(l+m)²-(l-m)²
=l²+2lm+m²-l²+2lm-m²
=4ml
=l²+2lm+m²-l²+2lm-m²
=4ml
Answered by
2
expand the terms
(l^2 +2lm+ m^2)-(l^2 - 2lm+m^2)
all terms get cancelled and the answer is 4lm
(l^2 +2lm+ m^2)-(l^2 - 2lm+m^2)
all terms get cancelled and the answer is 4lm
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