Respostas

2014-02-02T14:14:09-02:00
(x+5)²=(5x-3)²
(x+5)(x+5)=(5x-3)(5x-3)
x²+10x+25=25x²-30x+9
24x²+40x+16=0 (:4)
6x²+10x+4=0 (:2)
3x²+5x+2=0
ai vc vai tirar o delta que vai dar:
49
depois disso vc vai achar o valor de x pela formula:
entao o valor de x e:

x¹=1/3
x²=-2
2014-02-02T14:15:26-02:00
(x+5)²=(2x-3)²
x²+10x+25=4x²-12x+9
x²-4x²+10x+12x+25-9=0
-3x²+22x+16=0
-22+-√484-4(-3) .16 /2.(-3)
-22+- √484+192/-6
-22+-√676/-6
-22+-26/-6
x1=-22+26/6 = 4/6=2/3
x2=-22-26/6=-48/6= -8

S={-8,2/3}
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