Question

using identities evaluate 9.7x9.8

Answer 1

Step-by-step explanation:

9.7 = 10-0.3

9.8 = 10-0.2

9.7 × 9.8 =(10-0.3)(10-0.2)

10×10 - 10×0.3 - 10 × 0.2 + (-0.3)(-0.2)

100-3-2+0.06

95.06

9.7 × 9.8 = 95.06

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