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Question
Write in the expanded form: `(x + 2y + 4z)^2`
Solution
`(x + 2y + 4z)^2 = x^2 + (2y)^2 + (4z)^2 + 2x(2y) + 2(2y)(4z) + 2x(4z)`
`= x^2 + 4y^2 + 16z^2 + 4xy + 16yz + 4xz`
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