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# D o Now: - PowerPoint PPT Presentation

D o Now:. Put your homework in the basket. What is the area of a rectangle? A triangle? Find the area of the rectangle whose length is (x + 3) and whose width is (2x + 5). Homework . Factoring Word Problems #1.

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## D o Now:

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Presentation Transcript
Do Now:
• What is the area of a rectangle? A triangle?
• Find the area of the rectangle whose length is (x + 3) and whose width is (2x + 5).
Factoring Word Problems #1

The area of a rectangular door is given by the trinomial x2 – 14x + 45. The door’s width is (x – 9). What is the door’s length?

(x – 5)

Factoring Word Problems #2

The area of a rectangular painting is given by the trinomial a2 – 6a – 16. The painting’s length is

(a + 2). What is the perimeter of the painting?

4x - 12

Factoring Word Problems #3

The area of a rectangular computer screen is

4x2+ 20x +16. The width of the screen is 2x + 8. What is the length of the screen?

2x + 2

Factoring Word Problems #4

The area of a rectangular granite countertop is 12x2 + 10x – 12. The width of the countertop is 2x + 3. What is the length of the countertop?

6x - 4

Factoring Word Problems #5

3x

6

Find the missing side if the area is 6x2 + 33x + 42.

• 2x + 7
Factoring Word Problems #6
• When 2r2 + 33r – 54 and r2 + 18r are factored, a common factor is what?
• (r + 18)
Factoring Word Problems #7
• If x + 3 is a factor of x2 – 4x – w , then what is the value of w?
• x – 7 , w = 21