Answer:
Bree is correct
Explanation:
Given
Area of rectangle;

Joe's Result:

Bree' Result

Required
Determine whose result is correct and why.
To determine the correct result, we simply find the roots of the quadratic function

Such that A(x) = 0

Start Factorization;
Expand

Group the above expression in 2s

Factorize


Recall that; Area of a rectangle is calculated by;

By comparison;

At this point, we can conclude that Bree's computation is correct;
Reason
The product of (-3x + 42) and (2x – 7) will result in the given area of the rectangle