Question

Resolver as equações incompletas do 2 grau:
x² – 9 = 0
4x² – 25 = 0
4x² – 100 = 0
x² + 2x = 0
4x² – 5x = 0
x² + x = 0
3x² = 0

Answer 1

x² – 9 = 0
x² = 9
x = 3

4x² – 25 = 0
4x² = 25
x² = 25/4
x = 5/2

4x² – 100 = 0
4x² = 100
x² = 100/4
x= 10/2

x² + 2x = 0
x(x+2)=0
x’=0 x”+2=0
x” = -2

4x² – 5x = 0
x(4x-5)=0
4x’+ 5=0 x”=0
x’=-5/4

x² + x = 0
x(x+1)=0
x’+1=0 x”=0
x’=-1

3x² = 0
x² =0
x=0