Question

Люди добрые, помогите! оценка на четвертную влияет $1)4x^{2} -17x=0 2)48=x^{2} =0 3) -2x^{2} +50=0$

Answer 1

Ответ:

$1)4x^{2} -17x=0 \\ x(4x - 17) = 0 \\ x = 0 \: \: \: 4x - 17 = 0 \\ 4x = 17 \\ x = \frac{17}{4} = 4 \frac{1}{4} = 4.25$

$2)48 + x {}^{2} = 0 \\ x {}^{2} = - 48 \\ x = net \: korney$

$3) \: - 2 {x}^{2} + 50 = 0 \\ 2x {}^{2} = 50 \\ x {}^{2} = \frac{50}{2} = 25 \\ x = \pm 5$