How do you factorise x^2 +5x+6?

So firstly, you need to find two numbers that multiply to make 6 and add to make 5 Make a list of numbers that multiply to make 6 i.e. 16 and 32
So you can either have (x 6)(x 1) OR (x 3)(x 2)
Now you see that in x2 +5x+6, the 6 and 5 are both positive therefore there has to be an addition sign in both brackets therefore the only possibility is (x + 3)(x + 2) as if you used 6 and 1, their addition would make 7 which is not what we are looking for

JP

Related Maths GCSE answers

All answers ▸

f(x)= 5 - x and g(x)= 3x + 7. Simplify f(2x) + g(x-1) (2018 past paper question)


Solve: 3X - 5 = Y 2X +2 = Y +3


f(x) = 2x + c, g(x) = cx + 5, fg(x) = 6x + d. c and d are constants. Work out the value of d. 3 marks.


See answer section