<span>3х³-27х=0
3x(x</span>²-9)=0
3x(x-3)(x+3)=0
x=0
x=3
x=-3
( 4u × 2 + 3 ) × ( 3u - 6 ) × u5 = ( 8u + 3 ) × ( 3u - 6 ) × u5 = ( 8u + 3 ) × ( 3u - 6 ) × 5u = ( 40u² + 15u ) × ( 3u - 6 ) = 120u³ - 240u² + 45u² - 90u = 120u³ - 195u² - 90u
9y²-(3+2y)² = (3y-(3+2y))(3y+(3+2y)) = (3y-3-2y)(3y+3+2y)= (y-3)(5y+3)