exponent and surds

Question

if x⁴ =16 and y²=36 then which of the following is the possible value for (x,y)

 

(a)-12

(b)-4

(c)4

(d)16

(e)12

Answer 1

x⁴ = 16

x = ±2

 

and

 

y² = 36

y = ±6

 

Possible values for (xy) are:   

12, -12                                     (Assuming the operation in your question is a product)