Answer:
- 42
Step-by-step explanation:
4x5 + 8x4 – 2x2 + 9x – 10 = -42
-42
4x5 + 8x4 – 2x2 + 9x – 10
=20 + 32 - 4 - 90
= -42
4x5=20
8x4=32
2x2=4
9x (– 10)= -90
