4 years ago

Y = (-X)(-X) + 2 X + 4 X + Y = 4

1 answer:

andrey2020 [161]4 years ago

6 0

$y=(-x)(-x)+2x+4\\
x+y=4\\\\
y=x^2+2x+4\\
y=-x+4\\\\
-x+4=x^2+2x+4\\
x^2+3x=0\\
x(x+3)=0\\
x=0 \vee x=-3\\\\
y=-0+4 \vee y=-(-3)+4\\
y=4 \vee y=7\\\\
x=0,y=4\\
x=-3,y=7$

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