Question

giúp mk nha khẩn cấp, mk đang rất gấp rồi

Answer 1

\(A\left(x\right)=x\left(x^2+6x+10>0\right)=0\Leftrightarrow x=0\)

\(B\left(x\right)=x\left(x^2-16\right)=0\Leftrightarrow x\left(x-4\right)\left(x+4\right)=0\Leftrightarrow x=0;x=-4;x=4\)

\(C=x^4-9x^2=0\Leftrightarrow x^2\left(x^2-9\right)=0\Leftrightarrow x\left(x-3\right)\left(x+3\right)=0\Leftrightarrow x=0;x=3;x=-3\)

\(D\left(x\right)=x\left(x^2+2x+6>0\right)=0\Leftrightarrow x=0\)