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Gucha555
@Gucha555
July 2022
1
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Выполнить умножение:
а) (c+2)(c-3)
б) (2a-1)(3a+4)
в) (5x-2y)(4x-y)
г) (a-2)(a^2-3a+6)
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Mihail001192
Verified answer
a) ( c + 2 )( c - 3 ) = c² - 3c + 2c - 6 = c² - c - 6
б) ( 2a - 1 )( 3a + 4 ) = 6a² + 8a - 3a - 4 = 6a² + 5a - 4
в) ( 5x - 2y )( 4x - y ) = 20x² - 5xy - 8xy + 2y² = 20x² - 13xy + 2y²
г) ( a - 2 )( a² - 3a + 6 ) = a³ - 3a² + 6a - 2a² + 6a - 12 = a³ - 5a² + 12a - 12
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Answers & Comments
Verified answer
a) ( c + 2 )( c - 3 ) = c² - 3c + 2c - 6 = c² - c - 6
б) ( 2a - 1 )( 3a + 4 ) = 6a² + 8a - 3a - 4 = 6a² + 5a - 4
в) ( 5x - 2y )( 4x - y ) = 20x² - 5xy - 8xy + 2y² = 20x² - 13xy + 2y²
г) ( a - 2 )( a² - 3a + 6 ) = a³ - 3a² + 6a - 2a² + 6a - 12 = a³ - 5a² + 12a - 12