Question

3a²+b²-³ab
when a=2
b=-1​
maths

Answer 1

Explanation:

3(2)^2+(-1)^2-(2)×(-1)

3×2+(-1)-(-2)

6-1-2

6-3

3

Answer 2

Explanation:

3(2)^2+(-1)^2-(2)×(-1)

3×2+(-1)-(-2)

6-1-2

6-3

3