Question

qual e a resposta (2x-9) (x+10)

Answer 1

(2x-9).(x+10)=0

2x^2+20x-9x-90=0

2x^2+11x-90=0

∆=√121-4.2.(-90)

∆=√121+8.90

∆=√121+720

∆=√841

∆=29

x1=-11+29/2.(2)

x1=18/4

x1=9/2

x2=-11-29/4

x2=-40/4

x2=-10

s={-10,9/2}


espero ter ajudado!

bom dia !

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Answer 2

(2x-9) (x-10)=0

2x-9=0
x+10=0

x=9/2
x= - 10


x1= -10 e x2= 9/2