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8th Alg - L8.3--March15

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8th Alg - L8.3--March15

  1. 1. Assignment:1­­>L8.3, pg. 489, #2 ­ 28 (evens) ­ Due by the end of class!  1
  2. 2. Lesson 8.3 WarmUp:Factor each monomial completely.1) 16x3y22) ­20m5n2Find the GCF of each set of monomials.3) 10a ­  20a2 ­  25a4) 13c ­  5) 21ab ­  25d ­  35a ­  56ab3 2
  3. 3. Lesson 8.3:*To factor trinomials in the form of x2  +  bx  +  c, find 2 integers with a sum of b and a product of c. ex ­­>x2  +  6x  +  8          factors         sum of factors 3
  4. 4. *A quadratic equation is:  ax2  +  bx  +  c  =  0 and can be solved by factoring and then using the zero property.  ex ­­> x2  +  6x  =  27 factors sum of factors 4
  5. 5. Lesson 8.3 examples:Factor each polynomial.A) x2  +  14x  +  24B) x2  +  4x  ­  21 5
  6. 6. C) x2  +  8x  ­  48D) x2  ­  17x  +  72 6
  7. 7. E) x2  ­  16x  +  48F) ­42  ­  x  +  x2   7
  8. 8. Solve each equation.  Check your solutions.G) x2  +  x  = 20H) x2  +  56  =  ­18x 8
  9. 9. I) Mr. Lochmann wants to put in a rectangular pool and he wants to include a 24­foot fence around the pool.  The pool requires a space of 36 square feet.  What dimensions should the pool have? 9

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