SOLUTION: will you help me with these as soon as possible. 1. the area of a square is (4z^2 - 36z+81ft) find an expression for the perimeter of the square. then find the perimeter when z=

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: will you help me with these as soon as possible. 1. the area of a square is (4z^2 - 36z+81ft) find an expression for the perimeter of the square. then find the perimeter when z=      Log On


   

Question 294660: will you help me with these as soon as possible.
1. the area of a square is (4z^2 - 36z+81ft) find an expression for the perimeter of the square. then find the perimeter when z=10 ft.
2. tell whether x(4x^2 + 19x + 12) is completely factored. if not factor it.
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
1. a = (2z - 9)^2 ___ p = 4 (2z - 9) = 8z - 36

when z=10 ___ p = 80 - 36 = 44


2. x (4x + 3) (x + 4)