1) а) (1-2)(-3-4) = -1*(-7) = 7
1) б) (1-2)(2-2)(3-2)(2-4) = 0
2) а) аb * (4a + 5b + a + 3a) = ab * (8a + 5b)
ili 8a²b + 5ab² = ab * (8a + 5b)
2) б) -2x³ - 3xy² - 14x³ + 8xy² =
= -16x³ + 5xy² =
= x * (5y² - 16x²) =
= x * (y√5-4x)(y√5+4x)
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Answers & Comments
1) а) (1-2)(-3-4) = -1*(-7) = 7
1) б) (1-2)(2-2)(3-2)(2-4) = 0
2) а) аb * (4a + 5b + a + 3a) = ab * (8a + 5b)
ili 8a²b + 5ab² = ab * (8a + 5b)
2) б) -2x³ - 3xy² - 14x³ + 8xy² =
= -16x³ + 5xy² =
= x * (5y² - 16x²) =
= x * (y√5-4x)(y√5+4x)