5 - 1 2/9 = 3 7/9
Hope this helps!
Here we use the equation

Taking points (0,4), (1,2)
Substituting the point (0,4) , we will get

Substituting (1,2) we will get

So we have

Therefore , required equation is

<u>-5a²+13ab</u> should be subtracted.
<h3>Step-by-step explanation:-</h3>
Based on the given conditions, formulate,


Taking the coefficients or numbers, we get,

