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Published byHoward Jordan Modified over 9 years ago
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x 5
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2xy
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Fri 11/6 Lesson 4 – 4 Learning Objective: To factor difference and sum of cubes & by grouping Hw: Factoring WS 2
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Algebra II
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To factor difference of cubes To factor sum of cubes To factor by grouping
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Pull out the cube roots Square the first term Change the Sign First times the second term Plus the last term squared
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2x 1 3x 2 + 2x + 1) + 6x + 4)
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4x 5 x 6y - 20x + 25) - 6xy
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1 x 1
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Factor By Grouping Mainly used when there are 4 terms Group the first two terms & the last two terms Factor from each group “Combine” like terms
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(x + 5) (3x + 2y) (7y – 6) = (7y – 6)(x + 1)(x – 1)
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10. 32ax + 12bx – 48ay – 18by = 2(16ax + 6bx – 24ay - 9by) = 2(2x(8a + 3b) – 3y(8a + 3b)) = 2 (2x – 3y) (8a + 3b)
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11. 30ac + 80bd + 40ad + 60bc = 10(3ac + 8bd + 4ad + 6bc) = 10(3ac + 4ad + 8bd + 6bc) = 10(a(3c + 4d) + 2b(4d + 3c)) = 10 (a + 2b) (3c + 4d)
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(x – 3) (x – 8) = 2(x – 8)(x + 2)(x – 2)
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x 1
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6x 4 3x 2
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