using suitable identity find : a (48)²
b . 96²
c. 231²-131²
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Answer:
a) 48²
= (40+8)²
=(a+b)²= a²+b²+2ab
= 40²+8²+2(40)(8)
= 1600+64+640
2304
similar to second question
Step-by-step explanation:
c) 231²-131²
a²-b²= (a+b)(a-b)
(231+131)(231-131)
(362)(100)
36200
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