Question

vale 23pontos
Raiz de 2° grau

$5 {x}^{2} + 25 \times = 0$
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Answer 1

Resposta:

x(5x+25)=0

x1=0/(5x+25)=0

x2=5x+25=0

x2=5x=-25

x2=x=-25/5=-5

x1=0; x2=-5

S=(0,-5)