Question

Expand ( 2a + 3b – c)²

by using suitable identity.​

Answer 1

Answer:

to expand (3a+3b-c)² using an algebraic Identity

algebraic Identity used is,

(a+b-c)² => a²+b²+c²+2ab-2bc-2ca

here, a = 2a, b = 3b and c = -c

=> (2a+3b-c)²

=> (2a)²+(3b)²+c²+(2*2a*3b)-(2*3b*c)-(2*c*2a)

=> 4a² + 9b² + c² + 12 ab - 6 bc - 4 ac

Answer 2

Step-by-step explanation:

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