a: \(\Leftrightarrow2x\left(x+2\right)+4>x^2+4x+4\)
\(\Leftrightarrow2x^2+4x-x^2-4x>0\)
=>x<>0
b: \(\Leftrightarrow3\left(1-2x\right)-24x< 4\left(1-5x\right)\)
=>3-6x-24x<4-20x
=>-30x+3<4-20x
=>-10x<1
hay x>-1/10
c: \(\Leftrightarrow x^2+6x+8>x^2+10x+16+26\)
=>6x+8>10x+42
=>-4x>34
hay x<-17/2
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