X^2+2x-(x^2-9)=x^2+2x-x^2+9=2x+9
2x+9=13
2x=4
x=2
24-(12y^2-15y+4y-5)=22y-11-12y^2+6y+6
24-12y^2+15y-4y+5=28y-12y^2-5
-12^2+12^2+11y-28y=-5-29
-17y=-34
y=2
X^2 - 4x + 3 = 0
D= b^2 - 4ac = ( - 4) ^2 - 4*1*3 =16 - 12 = 4
√D=2
x1=4+2 / 2 = 3
x2 = 4 -2 / 2 = 1
Ответ: 3; 1