Question

Solve the pair of simultaneous equations.
y=8-x
2x square+ xy=-16

Answer 1

2x^2 + x(8-x) = -16
2x^2 +8x - x^2 = -16
x^2 + 8x + 16 = 0
(x + 4)((x + 4) = 0
x = -4
Back to first equation
y = 8 - - 4
y = 12

Answer 2

what does the sign
^ mean

Answer 3

it means that number is squared

Answer 4

i dnt get it @gshrand im not used to this sign ^

Answer 5

so instead of saying 2x squared im saying 2x^2
If i wanted to say 2x cubed i would say 2x^3

Answer 6

oooook

Answer 7

thank you for your help

Answer 8

No problem!