Question

14x-x^2=48 ...............................

Answer 1

Ответ: x₊=6; x₂=8

Решение:
14х-х²=48
-х²+14х-48=0;   /*(-1)  

x²-14x+48=0

D=(-14)²-4*1*48=196-192=4; √D=2
$x_{1}=\frac{14-2}{2*1} =6\\ \\x_{2} =\frac{14+2}{2*1}=8$