Объяснение:
Х^2+4у=24
Х+у=3 | ×(-4)
-4х-4у= - 12
+ —————
Х^2-4х=12
Х^2-4х-12=0
D=b^2-4ac=16-4×(-12)=16+48=64
X1=(4+8)/2=6
X2=(4-8)/2= - 2
У=3-х
У1=3-6= - 3
У2=3-(-2)=3+2=5
(6;-3) (-2;5)
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Объяснение:
Х^2+4у=24
Х+у=3 | ×(-4)
Х^2+4у=24
-4х-4у= - 12
+ —————
Х^2-4х=12
Х^2-4х-12=0
D=b^2-4ac=16-4×(-12)=16+48=64
X1=(4+8)/2=6
X2=(4-8)/2= - 2
У=3-х
У1=3-6= - 3
У2=3-(-2)=3+2=5
(6;-3) (-2;5)