Answer:
I think that it equals 1ab. Because 3ab - 9ab= -6ab + 7ab= 1ab
The equation in the given standard form is 
<h3>Equation of a circle</h3>
The standard equation of a circle is expressed as:

Given the equation 
Group the function to have:

Complete the squares to have:

Hence the equation in the given standard form is 
Learn more on equation of a circle here: brainly.com/question/1506955
Area = 1/2 * base * height = 1/2 * 5 * 3 3/4 = 9 3/8 or 9.375 in^2
<span>4.7, 8.51, 6.5, 7.42, 9.64, 7.2, 9.3
4.7 6.5 7.2 7.42 8.52 9.3 9.64
7.42 is the median.</span>