Factor completely 2x3 + x2 − 18x − 9. (2 points)

(x2 − 9)(2x + 1)

(x − 3)(x + 3)(2x − 1)

(x − 3)(x + 3)(2x + 1)

(2x − 3)(2x + 3)(x − 1)

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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the answer is 18 units because there are 18 small cubes inside the rectangle

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step-by-step explanation: