Jika 4x+5y=2 dan 3x+2y=5, maka nilai dari x(kuadrat)-y(kuadrat)=…

4x + 5y = 2 | x3
3x + 2y = 5 | x4
______________
12 x + 15y = 6
12 x + 8y = 20 (-)
______________
7y = -14
y = -14/7
= -2

4x + 5y = 2
4x + 5(-2) = 2
4x + (-10) = 2
4x = 2 + 10
4x = 12
X = 12/4 = 3

X = 3 , Y = -2
X(kuadrat) = 9 , Y( kuadrat) = 4