Tìm \(x\) biết: \(a)\left( {x + 2} \right)\left( {x + 3} \right) – \left( {x – 2} \right)\left( {x + 5} \right) = 6\) \(b)\left( {3x + 2} \right)\left( {2x + 9} \right) – \left( {x + 2} \right)\left( {6x + 1} \right) = \left( {x + 1} \right) – \left( {x + 6} \right)\)
Tìm \(x\) biết: \(a)\left( {x + 2} \right)\left( {x + 3} \right) – \left( {x – 2} \right)\left( {x + 5} \right) = 6\) \(b)\left( …