Question

|4+|5х+2||=9 решите уравнение

Answer 1

|4+|5x+2||=9 = $left { {{x geq 0} atop {x leq 0}} right.$ $left { {|4+5x+2|=9} atop |4-5x-2|=9}} right.$ = $left { {{4+5x+2=9} atop {-4-5x-2=9}} right. = left { {{5x=3} atop {-5x=15}} =left { {{x= frac{3}{5} } atop {x=-3}} right. right. x geq 0\ left { {{4-5x-2=9} atop {-4+5x+2=9}} right. = left { {{-5x=7} atop {5x=11}} right. = left { {{x=- frac{7}{5} } atop {x= frac{11}{5} }} right. x leq 0$ Следовательно ответы $frac{3}{5}$ и $- frac{7}{5}$

Answer 2

СПАСИБО!!! (¬_¬)