Feedback: Not quite! First, multiply $-5x$ by $4$, which gives $-20x$. Next, multiply $-5x$ by $-2x$, resulting in $+10x^2$. Then, multiply $3$ by $4$, which gives $12$. Finally, multiply $3$ by $-2x$, resulting in $-6x$. Combining all the terms, we get $-20x + 10x^2 + 12 - 6x$. Simplifying the like terms $-20x$ and $-6x$, we get $-26x$. So, the final simplified expression is $10x^2 - 26x + 12$.
Feedback: Well done! First, multiply $-5x$ by $4$, which gives $-20x$. Next, multiply $-5x$ by $-2x$, resulting in $+10x^2$. Then, multiply $3$ by $4$, which gives $12$. Finally, multiply $3$ by $-2x$, resulting in $-6x$. Combining all the terms, we get $-20x + 10x^2 + 12 - 6x$. Simplifying the like terms $-20x$ and $-6x$, we get $-26x$. So, the final simplified expression is $10x^2 - 26x + 12$.