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When we find the product of two terms that has the same base (in this case, a), we can simply add the powers. This can be explained using knowledge of squares and cubed. a2 = a...
firstly explain (x-3)2 = (x-3)(x-3) on the whiteboard I'd draw a square grid with each of the numbers, then I'd multiply out. E.g. x multiplied by x = x2; x multiplied by -3 = -3x an...
There are 2 ways to solve simultaneous equations which are by substitution or elimination. In this example you can use both but elimination is simpler. So we have 2x + 7y = 14 and x + y = 2. To use elimin...
This question is an example of compound interest rates. The question asks to find the interest rate of the bank. So first of all we should form an equation relating our initial amount, interest rate, time...
X=2Y=1
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