Answer:
19 (if it is x=5)
Though, (if it is really, x-5) then x-5= -5+√6
Step-by-step explanation:
*x=5; y=-2
x²+3y=0
5²+3(-2)=0 [substitute the given value of x and y]
25 + (-6) = 19
*x-5; y=-2
x²+3y=0
x²+3(-2)=0 [substitute the given value of x and y]
x²+ (-6)=0
x²= 6 [transpost]
x=√6, since x-5=0 then substitute so, √6 -5. Answer is -5+√6
