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2X2 = 4

The trick to working out how to do this, is to remember how to add normal fractions! We know 1/8 + 3/8 = 4/8 . The point here is that IF THE DENOMINATORS ARE THE SAME, we can add the numerators. So what a...

Start off by dealing with the brackets by expanding. The brackets around a part of the equation imply that the entire content of the brackets will be affected by the factor outside of the brackets, in thi...

Since there is only two terms it is a case of seeing what both terms have in common. Both share a 2 and an x so having this an the coefficient to the bracket gives 2x(x-7)

'No Nonsense' Answer: Our equation is x^2 - 2x - 15 = 0 so we want to find two numbers that add to get -2 and multiply to get - 15. The possible numbers pairs that multiply to get -15 are...1 and -15, -1 ...