Homework: Warm-Up: Factoring word problem worksheet

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Presentation transcript:

Homework: Warm-Up: Factoring word problem worksheet What is the formula for 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 January 29, 2014 Today’s Lesson: Factoring Word Problems January 29, 2014

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 painting’s width? x - 8

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 Find the missing side if the area is 6x2 + 33x + 42. 2x + 7 3x 6

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

Factoring Word Problems #8 A rectangle has dimensions that are the binomial factors of x2 + 8x + 16. What is the perimeter of the rectangle? 4x + 16