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प्रश्न
Using identities, evaluate 1.05 × 9.5
मूल्यांकन
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उत्तर
1.05 × 9.5
`= 105/100 xx 95/10`
`= (105xx95)/1000`
Apply Identity (a + b) (a – b) = a2 – b2
105 × 95 = (100 + 5) (100 – 5)
`= (100)^2 - (5)^2`
= 1000 – 25
= 9975
`1.05 xx9.5```
`=9975/1000```
= 9.975
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