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Completing the square of a function is sometimes used to find the stationary points on a curve, and also to solve when equaling zero. To complete the square firstly we have to halve the middle value of th...
(3x + 1)/(2x)I would use the whiteboard to explain the process
Finding the root means finding the solution when the equation is equal to zero, so when (x^2+5x+4)/(x^2-3x+2)=0. This happens when the numerator x^2+5x+4 is equal to zero so we have to find the roots. To ...
Price in March = a Price in April = a x 1.2 = 1.2aNumber sold in March= b Number sold in April = b x 0.75 = 0.75bIncome = Price x Number soldIncome in March = abIncome in April = 0.9abDecrease is ...
5x + y = 21x - 3y = 9First, multiply the equation one by 3 so we can cancel out the y's.15x + 3y = 63 (we've now multiplied this by 3)x - 3y = 9Now we can add the two equations together, thus adding 3 and...
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