Question

найдите корни уравнения (6x-9)*(4x+ 0.4 )=0

Answer 1

(6х-9)*(4х+0.4)=0
24х²+2.4х-36х-3.6=0
24х²-33.6х-3.6=0
D=1128.96+345.6=1474.56
х1=(33.6-38.4)/48= -0.1
х2=(33.6+38.4)/48=1.5