\(a,\Leftrightarrow25x^2-4-25x^2-10x+3=1\\ \Leftrightarrow-10x=2\Leftrightarrow x=-\dfrac{1}{5}\\ b,\Leftrightarrow16x^2-4x-6-16x^2-16x+5=5\\ \Leftrightarrow-20x=6\\ \Leftrightarrow x=-\dfrac{3}{10}\\ c,\Leftrightarrow9x^2+24x+16-9x^2+1=49\\ \Leftrightarrow24x=32\\ \Leftrightarrow x=\dfrac{4}{3}\\ d,\Leftrightarrow x^2-6x+5-x^2+4x-4=3\\ \Leftrightarrow-2x=2\Leftrightarrow x=-1\\ e,\Leftrightarrow x^2-25-x^2+4x-3=3\\ \Leftrightarrow4x=31\Leftrightarrow x=\dfrac{31}{4}\\ f,\Leftrightarrow x^3-3x^2+3x-1+3x^2+6x+3-x^3-8=0\\ \Leftrightarrow9x=6\Leftrightarrow x=\dfrac{2}{3}\)
Đúng 0
Bình luận (0)
