Solve the inequality x(x + 6) > 16 + 4x.
\(x(x+6) > 16+4x\)
\(x^2 + 6x >16 + 4x\)
\(x^2 + 2x > 16\)
\(x^2 + 2x - 16 > 0 \)
\((x+1)^2 > 17\) (understand why)
Solve for x, should be pretty straightforward.
