Question

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

Answer 1

Answer:

$\huge\boxed{ \bf\:x^{2} + 10x + 9}$

Step-by-step 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.

$x^{2} + x + x + 9\\= \boxed{ x^{2} + 10x + 9}$

$\rule{150pt}{2pt}$

Answer 2

Expansion : $(x+1)(x+9) = x(x+9) + 1(x+9) = x^{2} +9x + x + 9$
Simplify : $x^{2} +10x + 9$