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=((143x)-(147y))+((-2x21)-(-2xy))=42x-98y-42x+2xy=2xy-98y
So what does it mean when we factorise? Well, we want to take the highest common factor (HCF) of both of these algebraic terms and we want to take that outside the back to simplify the expression. First, ...
Expanding 3 brackets is very much the same method as expanding 2. In the example you gave, to start you would expand the first two brackets out using the FOIL method (firsts, outsides, insides and leftove...
To find the minimum point of a quadratic equation, the quadratic should be written in the form '(x+a)2+ b', i.e. completing the square, where the coordinates of the minimum point will be (-a,b)...
The first thing to do, is to assess how far the student has managed to work, and then find the missing pieces within the students skill or knoweldge. I might decide to go through the question with the stu...
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