Question

(9.5)^2 using identities ​

Answer 1

${9.5}^{2}$

${(10 - 0.5)}^{2}$

${(a - b)}^{2} = {a}^{2} - 2ab + {b }^{2}$

${10}^{2} - 2 \times 10 \times 0.5 + {0.5}^{2}$

$100 - 10 + 0.25$

$90.25$

Answer 2

Step-by-step explanation:

Using the identity (a+b)²=a²+b²+2ab:

(9.0+0.5)²=9²+(0.5)²+2×9×0.5

=> 81+0.25+18×0.5

=> 90.25

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