using identities evaluate - a) 1.05*9.5 .......answer it fast
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Verified answer
Hi !1.05 can be written as = 1 + 0.05
9.5 can be written as = (1 - 0.05) *10
hence,
1.05*9.5
= {1 + 0.05}*{(1 - 0.05) }*10
{1 + 0.05}*{(1 - 0.05)} this can be written in the form of the identity (a-b)(a+b) = a² - b²
= { 1² - (0.05)²}*10
= { 1 - 0.0025}*10
= 0.9975 *10
= 9.975
The ans is 9.975
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Hope this helps you !