Quadratic Simultaneous Equations

Question 1:

y=2x2+9x7 y=2x9
x=-0.314 or -3.19 y=-9.628 or -15.38

Question 2:

y=x215x+2 y=2x+10
x=17.5 or -0.458 y=45 or 9.084

Question 3:

y=x2+x10 y=x7
x=1.73 or -1.73 y=-5.27 or -8.73

Question 4:

y=x2+10x+6 y=2x4
x=-1.55 or -6.45 y=-7.1 or -16.9

Question 5:

y=3x2+11x2 y=x+7
x=0.737 or -4.07 y=7.737 or 2.93

Question 6:

y=x2x+10 y=2x+8
x=2 or 1 y=12 or 10