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Barbara0302
@Barbara0302
January 2020
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A=y²-3y
B=2y²-y a)A+B b)A.B c)A+B+C d)B.C
C=y²-2y
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exalunosp
A + b =
y² - 3y + 2y² - y = 3y² - 4y ****
ab
( y² - 3y ) ( 2y² - y) = 2y⁴ -y³ -6y³ + 3y² = 2y⁴ - 7y³ + 3y²
a + b + c = y² - 3y + 2y² - y + y² - 2y =4y² - 6y
bc = ( 2y² - y) ( y² - 2y) = 2y⁴ - 4y³ - y³ + 2y² = 2y⁴- 5y³ + 2y²
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y² - 3y + 2y² - y = 3y² - 4y ****
ab
( y² - 3y ) ( 2y² - y) = 2y⁴ -y³ -6y³ + 3y² = 2y⁴ - 7y³ + 3y²
a + b + c = y² - 3y + 2y² - y + y² - 2y =4y² - 6y
bc = ( 2y² - y) ( y² - 2y) = 2y⁴ - 4y³ - y³ + 2y² = 2y⁴- 5y³ + 2y²