Đáp án:
a) -4.(x-2)+5.(x-3)=26
=>-4x+8+5x-15-26=0
=>x-33=0
=>x=33
b) (3x-6).(x+5)=0
=>\(\left[ \begin{array}{l}3x-6=0\\x+5=0\end{array} \right.\)
=>\(\left[ \begin{array}{l}3x=6\\x=-5\end{array} \right.\)
=>\(\left[ \begin{array}{l}x=2\\x=-5\end{array} \right.\)
~Xin hay nhất ạ~