Question

Evaluate the following:
if x = -1, y = 2,z = -2,,
1. 2 x² - y²
2.2xy² - 3 yz + xz²
3.5 + 4x³ -2z²​

Answer 1

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Answer 2

Answer:

1).-2

2)

Step-by-step explanation:

1)2×(-1)^2-(2)^2

=2-4

=-2

2) 2×(-1)×(2)^2-3×2(-2)+(-1)(-2)^2

=-2×4-3×(-4)+(-1)×4

=8+12-4

=20-4

=16

I hope it will help u❤️