Предмет: Алгебра, автор: Ruzlan04

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Автор ответа: 12345677666666

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Universalka: В последнем задании во второй скобке знак плюс, а не минус

evachka15: вы в конце забыли написать "-", вместо "+" :)

evachka15: ой, то есть "+" вместо "-"

Автор ответа: evachka15

1) 1 - 9а² = ( 1 - 3а ) * ( 1 + 3а )
2) - n² + b² = b² - n² = ( b - n ) * ( b + n )
3) 81x² - y² = ( 9x - y ) * ( 9x + y )
4) 100a² - 25b² = 25 * ( 4a² - b² ) = 25 * ( 2a - b ) * ( 2a + b)
5) c² - a²b² = ( c - ab ) * ( c + ab )
--------------------------------------------------------
1) 25 - 16c² = ( 5 - 4c ) * ( 5 + 4c )
2) 4x² - q² = ( 2x - q ) * ( 2x + q )
3) 36p² - c² = ( 6p - c ) * ( 6p + c )
4) 144y² - 16k² = ( 12y - 4k ) * ( 12y + 4k )
5) a²c⁴ - 9 = ( ac² - 3 ) * ( ac² + 3 )

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