Question

x²+2xy-z² When x= (-2) , y = 3, z=1

Answer 1

Answer:

answer is -9

Step-by-step explanation:

=x²+2xy-z²

=(-2)²+2(-2)(3)-(1)²

=4-12-1

=-8-1

=-9

Answer 2

Answer:

-9

Step-by-step explanation:

x²+2xy-z²

When x= (-2) , y = 3, z=1;

-2² + [2 × (-2) × 3] - 1²

⇒ (-2 × -2) + (-12) - (1 × 1)

⇒ 4 + (-12) - 1

⇒ 4 - 12 - 1

⇒ -9

Hope this Helps