Quadratic Simultaneous Equations

Question 1:

y=x214x4 y=3x+4
x=17.5 or -0.458 y=56.5 or 2.626

Question 2:

y=x2+10x10 y=3x+3
x=1.52 or -8.52 y=7.56 or -22.56

Question 3:

y=3x2+8x2 y=2x+6
x=0.915 or -2.91 y=7.83 or 0.18

Question 4:

y=3x211x6 y=x+4
x=4.71 or -0.708 y=8.71 or 3.292

Question 5:

y=3x212x10 y=x+7
x=5.39 or -1.05 y=12.39 or 5.95

Question 6:

y=x28x6 y=2x5
x=10.1 or -0.099 y=15.2 or -5.198