Question

evaluate using identities 9.7x9.8

Answer 1

Answer:

FORMULA- (X+a)*(X+b)=x^2+(A+B)*X+(A)*(B)

Step-by-step explanation:

(9+0.7)*(9+0.8)=(9^2)+(0.7+0.8)*9+(0.7)*(0.8)

=81+7.9+0.56

=89.46

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