Giải phương trình (x^3-(x-1)^3=(7x-1)/(4x+3)
Giải thích
x3−x−134x+3x−5=7x−14x+3−xx−5x≠−34x≠5⇔x3−x3+3x2−3x+14x+3x−5=7x−1x−5−x4x+34x+3x−5⇒3x2−3x+1=7x2−36x+5−4x2−3x⇔−3x+36x+3x=5−1⇔36x=4⇔x=19(tm)
x3−x−134x+3x−5=7x−14x+3−xx−5x≠−34x≠5⇔x3−x3+3x2−3x+14x+3x−5=7x−1x−5−x4x+34x+3x−5⇒3x2−3x+1=7x2−36x+5−4x2−3x⇔−3x+36x+3x=5−1⇔36x=4⇔x=19(tm)