Question

evaluate 82×82× - 18×18 / 64 by using suitable identity​

Answer 1

Answer:

Step-by-step explanation:

given

=$\frac{82X82 - 18X18}{64}$

we can rewrite Numerator as

=$82^{2} -18^{2}$

we know Property

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

where a=82 and b=18

applying this property

=(82-18)(82+18)

=64(100)

=6400

threfore

$\frac{82X82 - 18X18}{64} \\=\frac{6400}{64}$

dividing and we get

=100            answer