Answer:
p= -1
Explanation:
We have been given parabola along positive side of x-axis with equation
[tex]y^2=4px\\\\and\\\\y^2=-4x[/tex]
after equating the values of [tex]y^{2}[/tex] we will get
4px =-4x
Divide each term by x on both left hand side and right hand side we will get
4p= -4
Now, divide each term by 4 on both left hand side and right hand side we will get the final result p=-1
