Question

Look at the following simultaneous equations:

xy=-16
y = x + 8
a) Show that these simultaneous equations
have exactly one solution.
b) What is the solution of these simultaneous
equations?
If any of your answers are decimals, give them
to 1 d.p.

Answer 1

x(x+8)=-16

x²+8x=-16

x²+8x+16=0

quadratic formula

Explanation:

make sure to sub.....

x² as (a)

8x as (b)

16 as (c)