Simplify the following expression and put in standard form: (4x – 5x2) + (3x4 – 4x + 2) – (62° + 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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