Algebra 3
2 marks · NormalExpand the following expression:
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2(x^2 - 8x + 16) = 2x^2 - 16x + 32
Common mistakes: Expanding (x-4)^2 incorrectly; forgetting to multiply each term by 2
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Marking points
M1 · 1 mark · Expands (x-4)^2 as x^2 - 8x + 16
A1 · 1 mark · Multiplies out both terms; full expansion 2x^2 -16x + 32
Worked solution