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By factorising the expression, (x-5)(x-4)=0. This means that either (x-5)=0 or (x-4)=0. By solving these equations we can work out the solutions to be x=4,5.
First thing to do is to find the stationary point of the curve. This is done by differentiating the function and then equating to zero, as the gradient of the stationary point is zero. Setting dy/dx to ze...
12 + 37 + 47 = (10 + 30 + 40) + (2 + 7 + 7) = 80 + 16 = 96
It is important to visualize well the operation, being able to separate and put together the numbers that are easy to calculate together. ...
sin^2(x)=1-cos^2(x) -------------> -4cos^2(x)+8cosx-3=0
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