Question

9.8×9.7 -evaluate the following with using identities

Answer 1

hey....

ur answer....

> we can write the given expression as
(10- .2)(10- .3)

this if we simplify we get,

100-3-2+.06
100-5+.06
=> 95+.06
=> 95.06

hope this helps u
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sid071

Answer 2

Answer:

95.06

Step-by-step explanation:

solution----->

given---->

9.8 x 9.7

$we \: have \: to \: solve \: this \: by \: usimg \: identities \: \\ \\ (x - a)(x - b) = {x}^{2} - (a + b)x + ab \\ \\ now \: we \: can \: write \: the \: given \: </strong><strong>e</strong><strong>x</strong><strong>p</strong><strong>a</strong><strong>n</strong><strong>s</strong><strong>i</strong><strong>o</strong><strong>n</strong><strong> \: \\ \\ (10 - 0.2)(10 - 0.3) \\ \\ now \: use \: above \: identities \\ \\ we \: get \\ \\ (10 - 0.2)(10 - 0.3) \\ \\ {10}^{2} - (0.2 + 0.3) \times 10 + 0.2 \times 0.3 \\ \\ 100 - (0.5) \times 10 + 0.06 \\ \\ 100 - 5 + 0.06 \\ \\ 95.06 \\ \\ this \: is \: proper \: ans$