Question

Simplify (5a+3b)(5a+3b)-(5a+3b)(5a-3b)-60ab

Answer 1

(25a2+30ab+9b2)-(25a2-9b2)-60ab

18b2-30ab

Answer 2

Step-by-step explanation:

first of all open all rhe brackets u will find 25a2 + 9b2 - 25a2 -9b2 -60ab cancel 25a2 and -25a2 similarly cancel +9b2 with -9b2.

so -60ab is the answer