Question

using identities evaluate 82²​

Answer 1

using (a+b)^2

(80+2)^2 = 80^2+2^2+2*2*80

= 6400+4+4*80

= 6404+320.

= 67204

$<marquee \: h$

67204

$<marquee \: h$

Answer 2

Answer:

AnSwEr=6724

Step-by-step explanation:

$\sf\ {82}^{2} \\ \\ \sf\ \implies: {(80 + 2)}^{2} \\ \\ \sf\ \implies: {(80)}^{2} + 2 \times 80 \times 2 + {(2)}^{2} \\ \\ \sf\ \implies:6400 + 320 + 4 \\ \\\sf\boxed{ \implies:6724 } \\ \\ \sf\\:using \:formula(a+b)^2=a^2+2ab+b^2$