Question

Expand and simplify (x+1)(x+9)

Answer 1

`\huge\boxed{ \bf\:x^(2) + 10x + 9}`

Explanation:

`(x + 1)(x+9)`

Let's expand it at first.

`(x + 1)(x + 9)\\= x (x + 9) + 1 (x + 9)\\= x^(2) + 9x + x + 9`

Now, simplify it.

`x^(2) + x + x + 9\\= \boxed{ x^(2) + 10x + 9}`

`\rule{150pt}{2pt}`