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Question
Factorise the expression.
2x3 + 2xy2 + 2xz2
Sum
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Solution
2x3 + 2xy2 + 2xz2
= 2 × x × x × x + 2 × x × y × y + 2 × x × z × z
= 2x (x2 + y2 + z2)
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