Помогите............

Б) 3х^2=18х
3х^2 - 18х = 0
3х(х-6) = 0
▪3х = 0
х1 = 0
▪х - 6 = 0
х2 = 6
ответ: (х1; х2) = (0; 6)

▪в)

$100 {x}^{2} - 16 = 0 \\ (10x - 4)(10x + 4) = 0 \\ - - - - - \\ 10x - 4 = 0 \\ 10x = 4 \\ x1 = 0.4 \\ - - - - - \\ 10x + 4 = 0 \\ 10x = - 4 \\ x2 = - 0.4$
▪г)

${x}^{2} - 16x + 63 = 0 \\ d = {b}^{2} - 4ac = {16}^{2} - 4 \times 63 = 256 - 252 = 4 \\ x1 = \frac{ - b + \sqrt{d} }{2a} = \frac{16 + \sqrt{4} }{2} = \frac{16 + 2}{2} = \frac{18}{2} = 9 \\ x2 = \frac{ - b - \sqrt{d} }{2a} = \frac{16 - 2}{2} = \frac{14}{2} = 7$