Evaluate 2 x^2+4 x y+6 y^2 where x = 2 and y = 5:
2 x^2+4 x y+6 y^2 = 2×2^2+4×2×5+6×5^2
2^2 = 4:
2×4+4×2×5+6×5^2
5^2 = 25:
2×4+4×2×5+6×25
2×4 = 8:
8+4×2×5+6×25
4×2 = 8:
8+8×5+6×25
8×5 = 40:
8+40+6×25
6×25 = 150:
8+40+150
| 1 | 5 | 0
| | 4 | 0
+ | | | 8
| 1 | 9 | 8:
Answer: | =198
