factorise the following expressions
a) ( L + m )^2 - 4lm
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6
see it's bro ....
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priya3429:
can you explain more
why you didn't solve 4lm
OK thanks
I cant understand
what you do
Answered by
6
Answer:
Step-by-step explanation:
(l+m)²-4lm
l²+m²+2lm-4lm {(a+b)²=a²+b²+2ab}
l²+m²-2lm
(l-m)² {(a-b)²=a²+b²-2ab}
(l-m)(l-m)
thanks a lot
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