Question

уравнения:
(4х+3)*(х-9)=0 ; (5х+3)*(х-7)=0

|x-5|=4

|x+5|=3

Answer 1

$1)(4x+3)*(x-9)=0 \ 4x+3=0;x-9=0 \ x=- frac{3}{4} =-0,75;x=9 \ 2) (5x+3)*(x-7)=0 \ 5x+3=0; x-7=0 \ x=- frac{3}{5}=-0,6 ; x=7 \ 3)|x-5|=4 \ x-5=+-4 \ x-5=4; x-5=-4 \ x=9; x=1 \ 4)|x+5|=3 \ x+5=+-3 \ x+5=3; x+5=-3 \ x=-2; x=-8$