Hi Shame on me for asking this but Do you multiply everything out before subtracting ? I got the answer n+1 but it's wrong.
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Hello Jones Originally Posted by Jones Hi Shame on me for asking this but Do you multiply everything out before subtracting ? I got the answer n+1 but it's wrong. No, not if you want the easiest method! Note that each term has a common factor , so take it out (not forgetting that it has to be squared): Even now, there's no need to multiply out. Use 'difference of two squares' in the second bracket. Grandad
Of curse! Stupid me. Thank you daddy!
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