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4x = 3y --> x = 3/4 y
(3/4 y)^2 + y^2 = 25
9/16 y^2 +y^2 = 25
25/16 y^2 = 25
y^2 = 16
y = 4 atau y = - 4
x = 3/4 y
y = 4 --> x = 3
y = - 4 -->x = -3
HP (x,y)= (3,4), (-3,-4)
4x=3y jadi
(4.x)²=(3.y)²
(4.x)+(4.x)=(3.y)+(3.y)
(16+4x+4x+x²)=(9+3y+3y+y²)
x²-y²=9+3y-16-4x
x²-y²=(-7)+3y-4x
x²-y²=(-7)+4x-4x
x²-y²=(-7)
x²+y²=25
x²-y²=-7
--------- (—)
2y²=32
y²=32/2=16
y=√16=4.
x²+y²=25
x²+16=25
x²=25-16=9
x=√9= 3.
jadi nilai x,y Berturut adalah (3,4)