Question

Find the value of the expression, if a =2, b= -2, c =1.​

Answer 1

Answer:

$given \: equation \: is \\ \\ 2 {a }^{2} + 2 {b}^{2} - 2 {c}^{2} \\ \\ put \: value \: of \: a ,b,c \: in \: \\ the \: given \: equation \\ \\ 2 ({2)}^{2} + 2 { (- 2)}^{2} - 2 {(1)}^{2} \\ \\ 8 + 8 - 2 \\ \\ 16 - 2 \\ \\ 14$

Answer 2

Step-by-step explanation:

2

if a= 2, 2a =2×4=8

2

if b=-2, 2b =2×4=8

2

if c=1, 2c =2

8+8-2=14