(i) (a + b)2 – (a - b)2
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Answered by
2
Step-by-step explanation:
good ques. but too easy
solve it by the identity a2 -b2 =a+b×a-b
Answered by
0
Answer:4ab
Step-by-step explanation:
(a+b)²-(a-b)²
a²+b²+2ab-a²-b²+2ab
4ab
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