Answer this 20 points and brainliest!

2x² + 2x

Step-by-step explanation:

Polynomials can be modeled using algebra tiles where square boxes each represent 'x²' and thin rectangles represent 'x'.  Smaller boxes would each represent a constant such as '2' or '3', however, in this representation there are no smaller boxes.  In this question, you have two large, square boxes that each represent 'x²' and two thin rectangles that represent a value of 'x'.  When we add x² + x² = 2x²; when we add x + x = 2x, so the overall polynomial expression is 2x² + 2x.  

i think this could be a possible answer (1 / 84) -1

good luck! : d

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.