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Verified answer
X - y = 3x • y = 40
maka x= 8 dan y=5
jdi jumlahny 13
Matematika SMP Kelas VIII
a - b = 3
a = b + 3
a x b = 40
(b + 3) x b = 40
b² + 3b - 40 = 0
(b + 8) (b - 5) = 0
b + 8 = 0
b = -8
b - 5 = 0
b = 5
a = b + 3
= -8 + 3
= -5 → (-5, -8)
a = b + 3
= 5 + 3
= 8 → (8, 5)
jumlah kedua bilangan = a + b
= (-5) + (-8)
= -13
atau
jumlah dua bilangan = a + b
= 8 + 5
= 13