# Math Help - troublesome algebra

1. ## troublesome algebra

I'm trying to help a younger relative with some maths but I'm stumped on a question. Can anyone help?

Part of the graph y=4/x is shown on the opposite grid. Draw a straight line on

the grid which will enable you to solve the equation 2x² - 9x + 4 = 0

Thanks!

2. ## A suggestion

You're trying to solve:
$
2x^2 -9x + 4 = 0
$

So rewrite this as:
$
4 = 9x -2x^2
$

Divide by x to get
$
4/x = 9 - 2x
$

So plot the line 9-2x on your graph and see where it intersects the 4/x curve.