Answer:
x^2 +12x +27
Explanation:
Area of rectangle =Length xWidth
=(x+9)(x+3)
=x^2 +3x +9x +27(by expanding)
=x^2 +12x +27
Hope this helps...
x^2+12x+27
The area of the blue is
x*x = x^2
The area of the pink is
9x
The area of the green is
3x
The area of the orange is
3*9 = 27
Add them together
x^2 +9x+3x+27
Combine like terms
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