Quick questions on Algebraic manipulation: expanding, factorising and rearranging - OCR GCSE Maths (A1 to A6)

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is sign errors expanding a double bracket?

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Watch the inner and last products, for example

(x - 4)(x - 2)

has a

+8

, not

-8

What is not taking out the highest common factor?

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4x^2 + 8x = 4x(x + 2)

, not

2(2x^2 + 4x)

left half-done.

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