Question

Resuelve estas ecuaciones de segundo grado : a) x2-9=0 b) x2-1=0 c) 2x2-2=0 d) 3x2-75=0 e) 18-2x2=0 f) 9x2+x=4+x g) x2-5x=9-5x

Answer 1

(x+3)(x-3) = 0
x = 3   y x = -3
CS = (-3; 3)



(x+1)(x-1) = 0
x = 1   y    x = -1
CS = (-1; 1)







(x+1)(x-1) = 0
x = 1   y x = -1
CS = (-1; 1)





 
(x+5)(x-5) = 0
x = 5   y    x = -5
CS = (-5; 5)