Question

Find the square of each of the following numbers Whiteout actual multiplication
63

Answer 1

$\rm 3969$

Step-by-step explanation:

$\rm 63^2 = (60+3)^2$

by using identity,

$\rm \boxed{(a+b)^2=a^2+b^2+2ab}$

$\rm (60+3)^2= (60)^2+(3)^2+2(60)(3)$

$\rm = 3600+9+360$

$\rm = 3600+369$

$\rm = 3969$