20-07-2017
Mathematics

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Part A: Factor 3x2y2 − xy2 − 2y2. Show your work. (4 points) Part B: Factor x2 + 6x + 9. Show your work. (3 points) Part C: Factor x2 − 25. Show your work. (3 points)

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20-07-2017

A) the greatest common factor is y^2 so

y^2(3x^2-x-2)

...

B) x^2+6x+9

x^2+3x+3x+9

x(x+3)+3(x+3)

(x+3)(x+3)

(x+3)^2

C)

x^2-25

x^2-5x+5x-25

x(x-5)+5(x-5)

(x+5)(x-5)

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