Resposta :
a ) 5x ( x + 3 ) = 0
5x= 0
x' = 0
x +3 =0
x"=-3
b) x ^2 = 100
x = +/- raiz de 100
x'= 10
x'' = -10
5x= 0
x' = 0
x +3 =0
x"=-3
b) x ^2 = 100
x = +/- raiz de 100
x'= 10
x'' = -10