Question

Resolva as equações incompletas
A)x2-16=0
B)x2-900=0
C)x2-3x=0
D)x2+5x=0 me ajudem? Preciso pra amanhã :)

Answer 1

a) x2-16=0
x2=0+16
x2=16
x=√16
x=4

b) x2-900=0
x2=900
x=√900
x=30

c)x2-3x=0
x(x-3)=0
x'=0
x''-3=0
x''=3
s{0,3}

d)x2+5x=0
x(x+5)=0
x'=0
x''+5=0
x''= -5
s{0,-5}

Answer 2

A) x²-16=0
X²=16
X=|/16
X=4

B)x²-900=0
X²=900
X=|/900
X=30

C)x²-3x=0
X(x-3)=0
X=0
X-3=0
X=3

D) x²+5x=0
X(x+5)=0
X=0
X+5=0
X= -5

Espero ter ajudado!