Search over 10,000 free study notes

Depending on what you prefer, you can either substitute or you can try to solve this by elimination. I'll explain both. 1) x - 2y = 1 2) x² - xy +y² = 1 If solving by elimination, yo...

We firstly need to look how to factorise quadratics. (x    )(x    ) By looking at this, we need 2 numbers that add together to make -1. We need 2 numbers that multiply to make -6. To multiply to make -6, ...

To explain this question to a student, I would initially ask my own questions in order to gain an understanding of what the student already knows about simultaneous equations. I would ask if they had seen...

7.4²-2.9²=answer²

square root above answer to get the answer

You can use pythagoras' theorem to find the length of a side of a right angled triangle, provided that at least two of the lengths of the sides are known. The general rule is a² + b²...