Why doesn't (a+b)^2 = a^2+b^2

(a+b)2 actually means (a+b)x(a+b) and so you have to solve this the long way unfortunately. You can use the grid method to do this [I would write this out on the whiteboard function at this point] which gives you the answer of a2+b2+2ab.

MT
Answered by Mai T. Maths tutor

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