Question

. Find the product using suitable identities
(i) (2a + 3b). (2a – 5b)​

Answer 1

Answer:

We need to find value of ( - 2a + 5b - 3c)^2 Suitable identity is (x + y + z)^2 = x^2 + y^2 + z^2 + 2xy + 2yz + 2xz Here x = - 2a , y = 5b and ...  

Answer 2

4a²-10ab+6ab-15b²

4a²-4ab-15b²