Question

12.Sa se rezolve in multimea numerelor reale inecuatia: (2x-1)(x+1)≤-x+11.

Answer 1

2$x^{2}$ +2x-x-1$\leq$-x+11
2$x^{2}$+2x-x+x$\leq$11+1
2$x^{2}$+2x$\leq$10