Toán Lớp 7: |2x+3|+ |3x+2|=7/2x giải hộ mình,cần gấp ạ
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Toán Lớp 7: |2x+3|+ |3x+2|=7/2x giải hộ mình,cần gấp ạ
Comments ( 2 )
+)|2x+3|>=0;|3x+2|>=0->|2x+3|+|3x+2|>=0->7/2x>=0->x>=0
->{(|2x+3|=2x+3),(|3x+2|=3x+2):}
->2x+3+3x+2=7/2x
<=>5x+5=7/2x
<=>3/2x=-5
<=>x=(-10)/3
Vậy : x=(-10)/3
|2x+3|≥0;|3x+2|≥0→|2x+3|+|3x+2|≥0→7/2x≥0→x≥0
\(\left[ \begin{array}{l}|2x+3|=2x+3\\|3x+2|=3x+2\end{array} \right.\)
→2x+3+3x+2=7/2x
->5x+5=7/2x
->3/2x=−5
->x=−10/3
Vậy: x=−10/3