Given the formula X=x to the power of 2 + y to the power of 2 can you find X if x=9,y=negative 4,z=1/2?

I see

X = x^2 + y^2 , and x=9 , y=-4 and z = 1/2
X = 81+16 = 97

where does z enter the picture?

I Don't know, it was our teacher who typed the questions.

Sure! To find the value of X using the given formula X = x^2 + y^2, we substitute the values of x and y into the equation and solve for X:

Given:
x = 9
y = -4

Substituting the values into the equation:
X = (9)^2 + (-4)^2

Calculating the exponents:
X = 81 + 16

Adding the values:
X = 97

Therefore, if x = 9 and y = -4, the value of X is 97.