Question

simplifique:
a] x^2-10x-25 b]6x^2-x-2
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5x^2-25x-5 3-2x-8x^2

Answer 1

Resposta:

a) x2-10x-25=0

x=(10+-√100-4.1.-25)/2

x=(10+-√200)/2

x=(10+10√2)/2

x=5+5√2

x=5-5√2

Explicação passo-a-passo:

b) 6x2-x-2=0

x=(1+-√1-4.6.-2)/12

x=(1+-√49)/12

x=1+7)/12

x=8/12

x=2/3

x=-6/12

x=-1/2

c)5x2-25x-5=0

x=(25+-√625-4.5.-5)/10

x=(25+-√725)/10

x=(25+-5√29)/10

x=(25+5√29)/10

x=(5+√29)/2

x=(5-√29)/2

d)???

3-2x-8x2=0

-8x2-2x+3=0

8x2+2x-3=0

x=(-2+-√4-4.8.-3)/16

x=(-2+-√100)/16

x=(-2+-10)/16

x=(-2+10)/16

x=8/16

x=1/2

x=-12/16

x= -3/4