Part a. the area of a square is (16x2 + 24x + 9) square units. determine the length of each side of the square by factoring the area expression completely. show your work. part b. the area of a rectangle is (4x2 − 49y2) square units. determine the dimensions of the rectangle by factoring the area expression completely. show your work.

A)      16x² + 24x + 9 = (16x² + 12x) + (12x + 9)= 4x(4x + 3) + 3(4x + 3)= (4x + 3)²side length = 4x + 3b)    4x² - 49y² < -- this equation cannot be factorised    but if you meant  4x²-49x²:         4x² - 49x²= (2x - 7x)²= (-5x)²= (5x)²side length = 5x (if it was a square, there isn't enough information in the                                     question to work out for a rectangle)