Question

find the value of expression ? a²-ab+2c² ,where a =2, b=-2 and c=-1 ​

Answer 1

(2×2)-2×(-2)+2×(-1×-1)

4-(-4)+2×1

8+2

10

Answer 2

Step-by-step explanation:

a²-ab+2c² ,where a =2, b=-2 and c=-1

putting value of abc in eqation

2²-(2-2)+2(1)²

4-0+2*1

4-0+2

=6