*Fully* simplify the expression​

12 x^2 + 130 x + 238

Step-by-step explanation:

Expand the following:

(3 x + 7) (4 x + 9 + 5^2)

5^2 = 25:

(3 x + 7) (4 x + 9 + 25)

Grouping like terms, 4 x + 9 + 25 = 4 x + (25 + 9):

4 x + (25 + 9) (3 x + 7)

25 + 9 = 34:

(4 x + 34) (3 x + 7)

(3 x + 7) (4 x + 34) = (3 x) (4 x) + (3 x) (34) + (7) (4 x) + (7) (34) = 12 x^2 + 102 x + 28 x + 238 = 12 x^2 + 130 x + 238:

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| 12 x^2 + 130 x + 238

answer: idk

step-by-step explanation:

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.

hope it