Expand and simplify: (x+7)(x+3)

This is a question that requires multiple steps, and in the exam may be worth around 3 marks. One will be for expanding, one for simplifying, and one mark for working.First step: expand the brackets. This could be completed using the grid method or drawing lined between the two brackets. (x+7)(x+3) x2 +3x +7x +21 Second step: simplify x2+10x +21

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Answered by Lily S. Maths tutor

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