Quadratic Simultaneous Equations

Question 1:

y=x2+6x1 y=x+5
x=1 or -6 y=6 or -1

Question 2:

y=3x212x1 y=x3
x=4.17 or 0.16 y=1.17 or -2.84

Question 3:

y=2x2+12x+2 y=2x+10
x=0.702 or -5.7 y=11.404 or -1.4

Question 4:

y=x214x1 y=x4
x=14.8 or 0.203 y=10.8 or -3.797

Question 5:

y=2x2+15x4 y=x5
x=-0.0722 or -6.93 y=-5.0722 or -11.93

Question 6:

y=2x2+11x4 y=x+3
x=0.622 or -5.62 y=3.622 or -2.62