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Expanding a quadratic equation (x-3)(x-2)=0

Focus on the left hand side of the equation: (x-3)(x-2) These are two factors, basically that (x-3) is a number, and (x-2) is another number. (x-2)(x-3) is just showing that you're multiplying these numbers ...
DW
Answered by Daniel W. • Maths tutor
6880 Views

When do I use Sin, Cos and Tan?

Just remember SOH,CAH,TOA. It sounds like Sock-A-Toe-Ah. Quite strange but extremely effective. SOH means Sin=Opposite/Hypotenuse Cos=Adjacent/Hypotenuse Tan=Opposite/Adjacent The three letters in each abbre...
DC
Answered by Darren C. • Maths tutor
3711 Views

Find the x-Coordinate of the minimum point of the function: f(x) = x^2 + 2x - 5

One of the easiest ways to find a minimum/ maximum point is using differentiation. The derivative of the function f(x) is usually written as dy/dx or f'(x) and is essentially a function that tells us the gra...
SM
Answered by Sachin M. • Maths tutor
13852 Views

I keep making silly mistakes how do I stop that?

That was always my biggest problem with my GCSE maths, I would get excited when I thought I knew what I was doing then slip up with silly mistakes. One of the best ways I found, after checking over at the en...
CW
Answered by Charlotte W. • Maths tutor
4989 Views

Expand and simplify (x+4)(x-5).

For this, we use the FOIL method of expanding brackets; start by multiplying the FIRST terms of each bracket together to get x x=x^2. Next multiply the OUTSIDE elements, ie the first element in the first bra...
AJ
Answered by Alex J. • Maths tutor
30564 Views