A wire is needed to support a vertical pole 12 feet tall. The cable will be anchored to a stake 9 feet from the base of the pole. How much cable is needed? (1 point)
O 15 feet
O 21 feet
O 3v7 feet
O 16 feet

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for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: