Question

qual a resposta de x²-9x+30=2+2x

Answer 1

x²-9x+30=2+2x

x²-9x+30-2-2x=0

x²-11x+28=0

x²-4x-7x+28=0

x.(x-4)-7(x-4)=0

(x-4).(x-7)=0

x-4=0

x-7=0

R= x=4

x=7

Answer 2

x²-9x+30=2+2x

x^2-9x+30-2-2x=0

x^2-11x+28=0

∆=√(-11)^2-4.1.(28)

∆=√121-112

∆=√9

∆=3

x1=-(-11)+3/2

x1=11+3/2

x1=14/2

x1=7

x1+x2=11

x2=11-7

x2=4

s={4,7}


espero ter ajudado!

boa noite!

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