Question

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EU PRECISO DE AJUDA​

Answer 1

Resposta:

Explicação passo-a-passo:

a) Utilizando

$a=1\\\\b=5\\\\c=-6$

Temos que:

$b^{2}-4ac=(5)^{2}-4.(1).(-6) \\\\b^{2}-4ac=25+24\\\\b^{2}-4ac=49$

b) Utilizando

$a=-1\\\\b=-5\\\\c=6$

Temos que:

$b^{2}-4ac=(-5)^{2}-4.(-1).(6)\\\\ b^{2}-4ac=25+24\\\\b^{2}-4ac=49$

c) Utilizando

$a=1\\\\b=-4\\\\c=4$

Temos que:

$b^{2}-4ac=(-4)^{2} -4.(1).(4)\\\\b^{2}-4ac=16-16\\\\b^{2}-4ac=0$

d) Utilizando

$a=2\\\\b=-4\\\\c=4$

Temos que:

$b^{2}-4ac=(-4)^{2}-4.(2).(4)\\ \\b^{2}-4ac=16-32\\\\b^{2}-4ac=-16$