Question

ПОМОГИТЕ ОЧЕНЬ СРОЧНО!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ДАЮ 30балов!!!!!!!

Answer 1

1,2mn-3n; -0,4m+1             0,3tu-0,3u; b-bt.

um⁷+uh⁷-hm⁷-h⁸=u(m⁷+h⁷)-h(m⁷+h⁷)=(m⁷+h⁷)(u-h).

x+2,9*(x-n)-n=x+2,9x-2,9n-n=3,9x-3,9n=3,9*(x-n).

10,2*11-2*10,2+11*19,8-2*19,8=10,2*(11-2)+19,8*(11-2)=10,2*9+19,8*9=
=9*(10,2+19,8)=9*30=270.

x³+4x²-6x-24=x²*(x+4)-6*(x+4)=(x+4)*(x²-6).