Cho bthức Q=(4√x /"2+√x" -8x/ 4-x):(√x-1/"x-2√x" - 2/√x) Rút Gọn
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Q=(4√x2+√x−8x4−x):(√x−1x−2√x−2√x)(x>0;x≠4)Q=(4√x2+√x−8x(2+√x)(2−√x)):(√x−1√x(√x−2)−2√x)Q=4√x(2−√x)−8x(2+√x)(2−√x):(√x−1)−2(√x−2)√x(√x−2)Q=8√x−4x−8x(2+√x)(2−√x).√x(√x−2)√x−1−2√x+4Q=8√x−12x2+√x√x3−√xQ=4√x(2−3√x)√x(2+√x)(3−√x)Q=4x(2−3√x)(2+√x)(3−√x)
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