A garden is extended on both sides. a. The area of the garden after the extension is represented by (x+12)^2. Find this product. b. Use the polynomial in part (a) to find the area of the garden when x=8. What is the area of the garden?

Answer:
Part a) [tex]x^{2}+24x+144[/tex]
Part b) The area of the garden is [tex]400\ units^{2}[/tex]
Step-by-step explanation:
Part a)
we know that
The area of the garden after the extension is equal to
[tex](x+12)(x+12)=(x+12)^{2}\\ \\=x^{2}+2x(12)+12^{2}\\ \\x^{2}+24x+144[/tex]
Part b) For [tex]x=8[/tex] find the area of the garden
Substitute the value of x in the polynomial
[tex]8^{2}+24(8)+144=400\ units^{2}[/tex]