8th alg - l7.7--feb23

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Page 1: 8th Alg - L7.7--Feb23

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Assignment:

1­­>L7.7, pg. 450­451, #2­32 (evens) ­ skip #24 ­ Due Monday (2/27)2­­>L7.8, pg. 455­457, #3­54 (3rds) ­ skip #21 ­ Due Monday (2/27)3­­>Chapter 7 Test ­ Thursday (3/1)

Page 2: 8th Alg - L7.7--Feb23

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Lesson 7.7 WarmUp:Find each sum or difference. 1) (3c2  ­  c  +  11)  +  (c2  +  2c  +  8)

2) (3c2  ­  c  +  11)  ­  (c2  +  2c  +  8)

Simplify each expression.3) ­3(5x2  +  2x  +  9)  +  x(2x  ­  3)

4) ­9g(­2g  +  g2)  ­  3(g2  +  4)

Solve this equation:5) 9c(c  ­  11)  +  10(5c  ­  3)  =  3c(c  +  5)  +  c(6c  ­  3)  ­  30

Page 3: 8th Alg - L7.7--Feb23

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Lesson 7.7:*To multiply 2 binomials, you can use the distributive property.

(3x   ­  4)(2x  +  5)

..."OR"...You can use  F

OIL

Page 4: 8th Alg - L7.7--Feb23

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**When 2 linear expressions are multiplied, the result is a "quadratic expression".

(the expression contains one term with a degree of 2)

***FYI...there is not a "foil" or shortcut method to multiplying other polynomials ­ must use the distributive property!

Page 5: 8th Alg - L7.7--Feb23

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http://www.youtube.com/watch?v=3y2nsCeoTac

Watch this cool video created by a couple of my former students

[Brenden Sexe & Caleb Schaller]

Page 6: 8th Alg - L7.7--Feb23

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Lesson 7.7 examples:Find each product.A) (2x  +  3)(x  +  5)

B) (x  ­  2)(3x  +  4)

C) (2y  ­  7)(3y  +  5)

Page 7: 8th Alg - L7.7--Feb23

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D) (6x  +  5)(2x2  ­  3x  ­  5)

E) (2y2  +  3y  ­  1)(3y2  ­  5y  +  2)

Page 8: 8th Alg - L7.7--Feb23

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F) (m2  +  2m  ­  3)(4m2  ­  7m  +  5)