EPPU
5) Using the identities, evaluate:
a) 7.1 x 7.2
Answers
Answered by
8
Answer:(7+0.1)×(7+0.2)
=7^2+7 (0.1+ 0.2) +(0.1)(0.2)
=49+2.1+0.02
=51.12 (ans)
Step-by-step explanation:
Answered by
3
Answer:
(7+0.1)(7+0.2)
51.12 is the correct answer.
Step-by-step explanation:
- using identity
(x+a)(x+b)=x²+x(a+b)+ab
x=7
a=0.1
b=0.2
substitute these values in the equation
=7²+7(0.1+0.2)+0.1×0.2
=49+2.1+0.02
=51.12
I hope it was helpful
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