Question

find the value of 2x2- 3y2 + z2​

Answer 1

Step-by-step explanation:

=2x2- 3y2 + z2

=4- 3y2 + z2

=z2- 3y2-4

Answer 2

Step-by-step explanation:

=(2x²)-(3y²)+(z²)

=(2×1×1)-(3×2×2)+(5×5)

=(2-12)+25

=(-10+25)

=15