Question

If a=3 b=2 c=-1 and d=-2 find the value of a) 3a+2b-6c+4d b) a2+2b2+3c-4d2

Answer 1

Step-by-step explanation:

3×3 +2×2 - 6×-1 +4×-2

= 9 + 4 + 6 - 8

= 13 -2

= 11

2

= 3× 2 + 2× 2 ×2 + 3× -1 - 4× -2×2

= 6 + 8 -3 + 16

14 + 13

27