Question

Y=9-x
y-2x^2+4x+6

solve the simultaneous equation

Answer 1

Explanation:

9-x-2x²+4x+6

=15+3x-2x²

=-2x²+3x+15

D=b²-4ac

=3²-4×-2×15

=9+120

=129

x1= (-b+VD)/2a

=(-3+V129)/-4

=(3+V129)/4

x2= (-b-VD)/2a

=(3-V129)/4