evaluate them by using identitiy
9.7 × 9.8
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Answered by
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95.06 will the answer of this evaluation
akshata4:
please told all solution
Answered by
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by using following identity (x + a) (x + b) = x2+ (a + b) x + ab
9.7×9.8
= (9 + 0.7 )(9 + 0.8)
= 9^2+ (0.7 + 0.8)9 + 0.63
= 81 + 13.5 + 0.63
= 95.06
hope it helps
or either this way
9.7 × 9.8 = (10 − 0.3) (10 − 0.2)
= (10)2 + [(− 0.3) + (− 0.2)] (10) + (− 0.3) (− 0.2)
= 100 + (− 0.5)10 + 0.06 = 100.06 − 5 = 95.06
9.7×9.8
= (9 + 0.7 )(9 + 0.8)
= 9^2+ (0.7 + 0.8)9 + 0.63
= 81 + 13.5 + 0.63
= 95.06
hope it helps
or either this way
9.7 × 9.8 = (10 − 0.3) (10 − 0.2)
= (10)2 + [(− 0.3) + (− 0.2)] (10) + (− 0.3) (− 0.2)
= 100 + (− 0.5)10 + 0.06 = 100.06 − 5 = 95.06
hope u like it pls mark brainliest
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