3x²+13x+4=3(x+4)(x+1/3)=(x+4)(3x+1)
D=169-4·3·4=121⇒
x1= -4
x2= -1/3
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3x²+13x+4=3(x+4)(x+1/3)=(x+4)(3x+1)
D=169-4·3·4=121⇒
x1= -4
x2= -1/3