using suitable identities find. 1) (x²-y) (x²+y) 2) 89² 3) 101². anwser allll and fast plz
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Answer:
1) (x²-y)(x²+y).
It is in the form of (a-b)(a+b)=a²-b².
(x²-y)(x²+y)=(x²)²-(y)².
=x⁴-y².
2) 89².
(80+9)².
It is in the form of (a+b)²=a²+b²+2ab.
(80+9)²=(80)²+(9)²+2(80)(9).
=6400+81+1440.
=7921.
3) 101².
(100+1)².
It is in the form of (a+b)²=a²+b²+2ab.
(100+1)²=(100)²+(1)²+2(100)(1).
=10000+1+200.
=10201.
I think this is your answer.
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