(x+1)(5x+7)
(x+1)(5x+7) view step
(x+1)(5x+7) view stepx+1=05x+7=0
(x+1)(5x+7) view stepx+1=05x+7=0x=-1
(x+1)(5x+7) view stepx+1=05x+7=0x=-1x=−1
(x+1)(5x+7) view stepx+1=05x+7=0x=-1x=−1x=-\frac{7}{5}
5 x ² + 12 x + 7 = 0
а=5; b=12; c=7
D=b²-4ac=12²-4×5×7=144-140=4
x1= 7/5
x2=-1
