10. 2/x-1 + 4/x+3 = 3x +11/x^2 +2x -3
Giải thích
2x−1+4x+3=3x+11x2+2x−3 (ĐKXĐ: x≠1,x≠−3)
⇔2x+3+4x−1x−1x+3=3x+11x−1x+3⇔2x+6+4x−4x−1x+3=3x+11x−1x+3⇒6x+2=3x+11⇔3x=9⇔x=3 TM
S=3
2x−1+4x+3=3x+11x2+2x−3 (ĐKXĐ: x≠1,x≠−3)
⇔2x+3+4x−1x−1x+3=3x+11x−1x+3⇔2x+6+4x−4x−1x+3=3x+11x−1x+3⇒6x+2=3x+11⇔3x=9⇔x=3 TM
S=3