C
chubetihon97


1) Giải phương trình:
a) $(4+5)(x+6)(x+10)(x+12)=3x^2$
b) $x.\frac{5-x}{x+1}(x+\frac{5-x}{x+1})=6$
c) $(\frac{1}{x^2 +x+1})^2 + (\frac{1}{x^2 +x+2})^2=\frac{13}{16}$
a) $(4+5)(x+6)(x+10)(x+12)=3x^2$
b) $x.\frac{5-x}{x+1}(x+\frac{5-x}{x+1})=6$
c) $(\frac{1}{x^2 +x+1})^2 + (\frac{1}{x^2 +x+2})^2=\frac{13}{16}$
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