Question

the equation x*2 + y*2 + z*2 + 2axy + 6y - 3z + 1 = 0 represent a sphere for what value to a ?
a ) 2
b ) -1
c ) 0
d ) 1 ​

Answer 1

Answer:

d)1

Step-by-step explanation:

2axy=2(1)xy

= 2xy

d)1

is the correct answer