Combine these radicals. a rectangle has an area of (x2 − 17x + 72) square units. since the area of a rectangle is determined using the formula, a = lw, what could be the length and width of the rectangle?

X2 - 17x + 72

=(x - 9)(x - 8)

if x = 20  the length of the rectangle is 12 units and width 11 units.

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.