Question

resolva as equaçoes do segundo grau incompletas;

a) x2-8=0 b) 5x2=0 c) 2x2-6x=0

Answer 1

Olá,
a)x²-8=0
x²=0+8
x²=8
x=±√8 =>
x=±2√2 =>
x'=-(2√2) e 
x''=2√2
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5x2=0
5x²=0
x²=0/5 =>
x²=0 =>
x=√0 => x=0
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c) 2x2-6x
2x²-6x=0
2x(x-3)=0
(x-3)=0 =>
x=0+3 => x'=0 e x''=3
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