2(x+5)-x^2-5x=0. Bài tìm x, cần gấp ạ Question 2(x+5)-x^2-5x=0. Bài tìm x, cần gấp ạ in progress 0 Môn Toán Khải Quang 4 years 2020-10-30T14:42:25+00:00 2020-10-30T14:42:25+00:00 2 Answers 166 views 0
Answers ( )
`2(x + 5) – x^2 – 5x = 0`
`↔ -x^2 + 2x – 5x + 10 = 0`
`↔ -x(x – 2) – 5(x – 2) = 0`
`↔ -(x + 5)(x – 2) = 0`
`↔` \(\left[ \begin{array}{l}x=2\\x=-5\end{array} \right.\)
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