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The area of a rectangular window is (6x2 + 5x – 4)cm². The width of the window is (2x - 1)cm.
(a) Find the height of the window in terms of x.
(b) If x = 40, find the perimeter of the window.

Respuesta :

Answer:

Step-by-step explanation:

a)

W =              3x + 4    

2x - 1 | 6x² + 5x - 4

   -      6x² -  3x

                    8x - 4

           -        8x - 4

                            0  

b) P = 2((2x - 1) + (3x + 4))

   P = 2(5x + 3)

   P = 10x + 6

   P = 10(40) + 6

   P = 406 cm

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