Question

Resolva as equações incompletas do 2° grau:


A) 2x²-100=0      D) -3x²+180=0
B) 7x²-112=0      E) 2x²-14x=0
C) 4x²-3x=0        F) 4x²-256=0

Answer 1

A-)
2(x²-50)=0
x²-50=0
x²=50
x1=√50
x2=-√50

b-)
7(x²-16)=0
x²-16=0
(x+4)(x-4)=0
x1=4
x2=-4

C-)
x(4x-3)=0
4x-3=0
4x=3
x=3/4
x2=0

D-)
-3 (x²-60)=0
x²-60=0
x²=60
x1=√60
x2=-√60

E-)
2x(x-7)=0
x-7=0
x=7
x2=0

F-)4(x²-64)=0
x²-64=0
(x+8)(x-8)=0
x1=8
x2=-8