Question

the value of 6a^2b^2-4ab when a=2,b=-1 is​

Answer 1

Answer:

6a×2b×2-4ab / a=2, b=-1

6×2 × 2×-1 ×2 -4×2×-1

12×-2×2 - (-8)

12×-4+8

-48+8

-40