Question

-
If x = 1, y = 2, z = 3, the value of
2x² + y² - z²+4 is -
(a) 10
(b) 1
(c) 4
(d) 10​

Answer 1

Answer: 1

Step-by-step explanation:

put the values of x,y and z in the equation,

∴ $2x^2 +y^2 - z^2+4 = 2 * (1)^2 + (2)^2 - (3)^2 +4$

=$2*1 + 4 - 9 + 4$

= 2 + 4 - 9 + 4

= 1