Appendix A - Review - A.4 Factoring Polynomials - A.4 Assess Your Understanding - Page A40: 124

$(2x+1)(30x-19)$

We factor out $2x+1$ and distribute, combine like terms, and simplify as follows: \begin{align*} 5(2x + 1)^2 &+ (5x - 6) \cdot 2(2x + 1) \cdot 2\\ &=(2x+1)[5(2x+1)+4(5x-6)]\\ &=(2x+1)[10x+5+20x-24]\\ &=(2x+1)(30x-19). \end{align*}