Question

((x + 3)^2 explanation of polynomials

Answer 1

Explanation

The question wants us to expand the given expression

$(x+3)^2$

To expand this, we will have

$(x+3)^2=(x+3)\times(x+3)$

We can now use the FOIL method of expansion

'

So that

$\begin{gathered} first=x\times x=x^2 \\ outer=x\times3=3x \\ inner=3\times x=3x \\ last=3\times3=9 \end{gathered}$

Combining the values above

$x^2+3x+3x+9=x^2+6x+9$

The answer is: x²+6x+9