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alisonhenrique
@alisonhenrique
March 2022
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me ajudem por favor a)2x(x-2)+3x(x-5) b)x(2x-10)-5x(x-2) c)(x+2)x+3)-2(x+4)
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Always4NA
A) 2x(x-2)+3x(x-5)
2x
²-4x+3x²-15x
5x²-19x=0
Δ=19²-4.5.0
Δ= 361-0
Δ=361
x= (-(-19)+√361) / 2.5
x= (19+19) / 10
x = 38/10
x=3,8
x= (-(-19)-√361) /2.5
x= 19-19/2.5
x= 0
4 votes
Thanks 4
Always4NA
b)
Always4NA
b) x(2x-10)-5x(x-2)
alisonhenrique
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2x²-4x+3x²-15x
5x²-19x=0
Δ=19²-4.5.0
Δ= 361-0
Δ=361
x= (-(-19)+√361) / 2.5
x= (19+19) / 10
x = 38/10
x=3,8
x= (-(-19)-√361) /2.5
x= 19-19/2.5
x= 0