Question

Equações :

a . 6x+5=0
b. 2x²/5=x/0
c. x²-9/25=0

Answer 1

 
 
 
 
a . 6x+5=0 ==> 6x = - 5 ==> x = - 5/6

b. 2x²  = x
     5       0
     5x =  2x².0
      5x = 0
       x = 0

c. x²-9/25=0

    x² =   9
           25

       x = +/- V9  ==> x = +/-  3
                  V25                  5

Answer 2

$a)6x+5=0 \\ 6x=-5 \\ x= \frac{-5}{6} \\ \\ \\ \\ b) \frac{2 x^{2} }{5} = \frac{x}{0} \\ \\ 2 x^{2}*0 =5*x \\ 0=5x \\ \frac{0}{5}=x \\ x=0$




$c) x^{2} - \frac{9}{25}=0 \\ mmc=25 \\ 25 x^{2} -9=0 \\ 25 x^{2} =9 \\ x^{2} = \frac{9}{25} \\ x=\pm \sqrt{ \frac{9}{25} } \\\\ x=\pm \frac{3}{5} \\\\ S=(- \frac{3}{5} ; \frac{3}{5} )$