1. ## Graph Equation

(a) I got 2x^2 - 9x + 4 = 0

(b) I can't do

(c) x = 1/2 or x = 4

(a) I got 2x^2 - 9x + 4 = 0

(b) I can't do

(c) x = 1/2 or x = 4
For a)

Simply multiply through with $x$ and take all the terms over to the left hand side of the equal sign.

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For b)

$xy = 4$ ----- (1)

$2x^2 - 9x + 4 = 0$
$-(2x^2 - 9x) = 4$ ------- (2)

Set (1) = (2)

$-(2x^2 - 9x) = xy$

$y = -(2x - 9)$

$y = -2x + 9$

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For c)

$2x^2 - 9x + 4 = 0$

$(2x - 1)(x - 4) = 0$

$x = \frac{1}{2} \ or \ x = 4$