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9. Evaluate the following using identities :
(1) 99 x 101 (ii) 29.5 x 30.5
(11) 153 x 147
19. 1
Answers
Answered by
3
Step-by-step explanation:
- (100-1)(100+1)=(100)^2-(1)^2=9999
- (30-0.5)(30+0.5)=(30)^2-(0.5)^2=899.75
- (150+3)(150-3)=(150)^2-(3)^2=22491
Answered by
1
Answer:
In, this question you solved it with the help of identity....
(x+a) (x+b) = x^2+(a+b)x+ab....
Step-by-step explanation:
Question-1. 99 x 101= (100)^2+(-1+1)100+-1x1....
=10000+0-1......
=9,999.....
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