Question

SECTION C (4 X 3 = 12 MARKS)
15. Evaluate: 9x2 + 4y - z, if x = 2, y = 1, z = 2

Answer 1

Answer:

20

Step-by-step explanation:

9×2+4×1-4×2==. 20

......

Answer 2

Answer:

$38$

Step-by-step explanation:

9x² + 4y - z

iif x = 2, y = 1, z = 2

putting values in the equation

= 9x² + 4y - z

= 9(2)² + 4(1) -(2)

= 9(4) + 4 - 2

= 36 + 4 - 2

= 36 + 2

= 38

hence,

Ans = 38