Question

Show that : (5ab + 3b)^2 - (5a - 3b) ^2 = 60ab^2

Answer 1

Answer:

60ab=60ab

Step-by-step explanation:

by using identity :- (a^2+b^2+2ab) - (a^2+b^2-2ab)

[(5a)^2+(3b)^2+2*5a*3b]-[(5a)^2+(3b)^2-2*5a*3b]

(25a^2+9b^2+30ab)-(25a^2+9b^2-30ab)

25a^2+9b^2+30ab-25a^2-9b^2+30ab

60ab=60ab

Hence proved