Question

Решите уровнения срочно - 5x2 =0 1,7x2=0. 2x2-8=0. 4x2=-16 3x2+5x=0. X2=7x

Answer 1

Ответ:

Объяснение:

$-5x^2=0\\x^2=\frac{0}{-5} \\x^2=0\\x_1=x_2=0$

$1.7x^2=0\\x^2=0:1.7\\x^2=0\\x_1=x_2=0$

$2x^2-8=0\\2x^2=8\\x^2=8:2\\x^2=4\\x_1=2\\x_2=-2$

$4x^2=-16\\x^2=-4$

Ответ:x∉R

$3x^2+5x=0\\x(3x+5)=0\\x_1=0\\3x_2+5=0\\3x_2=-5\\x_2=-5:3\\x_2=-1\frac{2}{3}$

$x^2=7x\\x^2-7x=0\\x(x-7)=0\\x_1=0\\x_2-7=0\\x_2=7$