Question

Solve the simultaneous equations
y=2-5x
y = x² – 2x – 8

Answer 1

Explanation:

sub equation 1 into 2

2-5x=x²-2x-8

0=x²-2x+5x-8-2

0=x²+3x-10

0=(x-2)(x+5)

x=2 or x=-5

sub x into equation 1

y=2-5(2) or y=2-5(-5)

y=-8 y=27