х = -4 ; х = 6/7
Объяснение:
x(7x-6) +4(7x-6)=0
7х²-6х+28х-24=0
7х²+22х-24 = 0
D = 22²-4*7*(-24) = 484 + 672 = 1156 = 34²
x12 = (-22±34)/(2*7)
x1 = 6/7
x2 = -4
(х+4)(7х-6) = 0
х+4=0
х= -4
7х-6=0
7х=6
х= 6/7
х = -4 ; х = 6/7
Объяснение:
x(7x-6) +4(7x-6)=0
7х²-6х+28х-24=0
7х²+22х-24 = 0
D = 22²-4*7*(-24) = 484 + 672 = 1156 = 34²
x12 = (-22±34)/(2*7)
x1 = 6/7
x2 = -4
x(7x-6) +4(7x-6)=0
(х+4)(7х-6) = 0
х+4=0
х= -4
7х-6=0
7х=6
х= 6/7