How do you find the total area of a composite figure

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Which of the following describes the graph of y--4x-36 compared to the parent square root function? stretched by a factor of 2, reflected over the x-axis, and translated 9 units right stretched by a factor of 2, reflected over the x-axis, and translated 9 units left stretched by a factor of 2, reflected over the y-axis, and translated 9 units right stretched by a factor of 2, reflected over the y-axis, and translated 9 units left save and exit next submit

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?