Question

using algebraic identies expand the following (2a+3b-5c)^2​

Answer 1

Answer:

[2a + 3b + (-5c)}^2

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

4a^2 + 9b^2 + 25c^2 + 12ab - 30bc - 20ca.

Step-by-step explanation:

just apply the identity (a+b+c)^2 = a^2 + b^2 + c^2 + 2(ab + cb  + ca)