Question

Resolva as equações:

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Answer 1

Explicação passo-a-passo:

x²-5x=0

x(x-5)=0

x-5=0

x=0+5

x=5

s={0,5}

x²+10x=0

x(x+10)=0

x+10=0

x=0-10

x=-10

s={0,-10}

12x²-36x=0

x(12x-36)=0

12x-36=0

12x=0+36

12x=36

x=36/12

x=3

s={0,3}

x²=-x

x²+x=0

x(x+1)=0

x+1=0

x=0-1

x=-1

s={0,-1}

7x²+14x=0

x(7x+14)=0

7x+14=0

7x=0-14

7x=-14

x=-14/7

x=-2

s={0,-2}