2 câu trả lời
Đáp án:
x3+1x2+2x+1.x2-12x2-2x+2
=
= [(x + 1).(x - 1).(x^2 - x + 1)]/[(x + 1).2.(x^2 - x + 1)]
= [\cancel{(x + 1)}.(x - 1).\cancel{(x^2 - x + 1)}]/[\cancel{(x + 1)}.2.\cancel{(x^2 - x + 1)}]
= (x - 1)/2
#dariana
Đáp án:
x3+1x2+2x+1.x2-12x2-2x+2
=
= [(x + 1).(x - 1).(x^2 - x + 1)]/[(x + 1).2.(x^2 - x + 1)]
= [\cancel{(x + 1)}.(x - 1).\cancel{(x^2 - x + 1)}]/[\cancel{(x + 1)}.2.\cancel{(x^2 - x + 1)}]
= (x - 1)/2
#dariana