In this example we are multiplying two binomials so FOIL method can be used.
$$ \begin{aligned} \left( \color{blue}{ 4x+3}\right) \cdot \left( \color{orangered}{ x+2}\right) &= \underbrace{ \color{blue}{4x} \cdot \color{orangered}{x} }_{\text{FIRST}} + \underbrace{ \color{blue}{4x} \cdot \color{orangered}{2} }_{\text{OUTER}} + \underbrace{ \color{blue}{3} \cdot \color{orangered}{x} }_{\text{INNER}} + \underbrace{ \color{blue}{3} \cdot \color{orangered}{2} }_{\text{LAST}} = \\ &= 4x^2 + 8x + 3x + 6 = \\ &= 4x^2 + 8x + 3x + 6 = \\ &= 4x^2+11x+6; \end{aligned} $$