Question

Find the square of 625 by using the identity (a + b)2 = a2 + 2ab + b2​

Answer 1

Answer:

390625

Step-by-step explanation:

625=600=25

(600+25)2 = (600)2 + 2*600*25 + (25)2

(600+25)2 = 360000 + 600*50 +  625

(600+25)2 = 360000 + 30000 +625

(600+25)2 = 390625