Question

Ada yg bisa ngerjain no. 17, 18 atau 20 ?

Answer 1

17.
x-y-1=0
-y=-x+1
y=x-1

x²-6x+5=y
x²-6x+5=x-1
x²-6x-x+5+1=0
x²-7x+6
(x-6)(x-1)
x=6 atau x=1

p+r=x1+x2=6+1=7

18.
y-3=0
y=3

x²+y²=25
x²+3²=25
x²=25-9
x²=16
x=4

hp(4,3)