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How do you factor $7 x + 28$ ?

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8 (x - 2)

(2 x + 2) (x - 2)

(9 x - 2) (2 x + 2)

7 (x + 4)

answer is D.

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Detailed Solution

p (x) = d (x) q (x) + r (x)

(Euclidean division formula)

7 x + 28 = 7 \cdot x + 7 \cdot 4

= 7 (x + 4)

(Distributive property of multiplication over addition)

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