Question

15. If x= -1, y = -2 and z = 3, find the value
of x2 - yz - zx.​

Answer 1

Answer:

7

Step-by-step explanation:

-1(2) -(-2)(3) - (3)(-1) = -2+6+3

= -2+9 = 7

Answer 2

Answer:

x² - yz - zx  = 10

Step-by-step explanation:

x² - yz - zx

Given, x = -1, y = -2 and z = 3

x² - yz - zx = (-1)² - (-2×3) - (3×-1) = 1 + 6 +3 = 10