1) 4x²-4y²= 2) x²-x в четвертой ст = 3) 2m-4m+2= 4) x²-a²-10a-25=

1 ) 4 * x ^ 2 - 4 * y ^ 2 = 4 * ( x ^ 2 - y ^ 2 ) = 4 * ( x - y ) * ( x + y ) 2 ) x ^ 2 - x ^ 4 = x ^ 2 * ( 1 - x ^ 2 ) = x ^ 2 * ( 1 - x ) * ( 1 + x )3 ) 2 * m - 4 * m + 2 = ( 2 * m - 4 * m ) + 2 = m * ( 2 - 4 ) + 2 = m * ( - 2 ) + 2 =2 - 2 * m = 2 * ( 1 - m )4 ) x ^ 2 - a ^ 2 - 10 * a - 25 = x ^ 2 - ( a ^ 2 + 10 * a + 25 ) = x ^ 2 - ( a ^ 2 + 2 * a * 5 + 5 ^ 2 ) = x ^ 2 - ( a + 5 ) ^ 2 = ( x - ( a + 5 )) * ( x + a + 5 ) = ( x - a - 5 ) * ( x + a + 5 )