Question

please answer this question ​

Answer 1

Answer: $lb-7l+9b-63$

Step-by-step solution:

First, we can create an equation to solve this: $(l+9)*(b-7)$. The first thing we can do is expand it. $l*b+l(-7)+9b+(-63)$ Now, we can quickly multiply and simplify this. $l(-7)$can be simplified to $-7l$. Our equation should look like this: $lb-7l+9b-63$. This is, as far as I'm sure, its simplest form.

Hope this helps you!