Question

2
Expand
(2a - b + c)​

Answer 1

Answer:

2a−b+c)

2

According to the equation ,

(a+b+c)

2

=a

2

+b

2

+c

2

+2ab+2bc+2ca

So we get,

Using the formula we can it write it as

(2a−b+c)

2

=(2a)

2

+(−b)

2

+c

2

+2(2a)(−b)+2(−b)c+2c(2a)

On further calculation we get,

(2a−b+c)

2

=4a

2

+b

2

+c

2

−4ab−2bc+4ac

hope it's helpful...