3.
Using suitable identities evaluate the following:
(a)
287 x 313
(d) 792
(9)
13.12 - 2.92
(b)
23 x 25
(e)
7.5 x 8.5
(h) 205 x 250
(c) 592 - 412
(f)
1092
(i) 1252
Answers
Answered by
0
Answer:
Correct option is
C
89991
(297)(303)
=(300−3)(300+3)
Using ,
(a−b)(a+b)=a2−b2 we get,
(300)2−(3)2
=90000−9
=89991
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