Question

решите на множестве R уравнение 

а) -5.91x^2=0

b)3√37x²=0

v)(x-3.1)(x-7)=0

g)(x+5.7)(x=2.8)=0

d)x²+2.8x=0

e)x²-9.3x=0

Answer 1

$-5.91x^2=0; x=0$

 

$3sqrt{37}x^2=0; x=0;$

 

$(x-3.1)(x-7)=0;\\x-3.1=0;x_1=3.1;\\x-7=0;x_2=7;$

 

$(x+5.8)(x+2.8)=0;\\x+5.8=0;x_1=-5.8;\\x+2.8=0;x_2=-2.8$

 

$x^2+2.8x=0;x*x+x*2.8=0;\\x(x+2.8)=0;\\x_1=0;\\x+2.8=0;x_2=-2.8$

 

$x^2-9.3x=0;\\x(x-9.3)=0;\\x_1=0;\\x-9.3=0;x_2=9.3$