How to factorise x^2 + 6x +5

Firstly you check to see if there is a coefficient to the x2 term, in this example there isn't so we know that both the brackets will have a single x in, (x +  )(x +  ). We also know both the signs in the brackets are positive because all the terms in the initial question are positive. Now all we need to do is find two numbers that multiply together to get 5 and add together to get 6, here the obvious answer is 5 and 1. 5x1=5 as wanted and 5+1=6 as wanted. Therefore the final answer will be; x2 + 6x + 5 = (x+5)(x+1). You can also check your answer by multiplying out the brackets which will get you x2 + 5x + 1x + 5 = x2 + 6x + 5 as wanted.

FE

Related Maths GCSE answers

All answers ▸

Given that x(a+bx)(a-bx)=25x-4x^3, what is the value of b^(-a)? a,b>0


'There are two adults and two children in the Adams family. They buy an all-day travel ticket for each person. The price is £8 for each adult and £5 for each child. They also buy 4 ice-creams at £1.95 each. How much do they spend in total?'


Express x^2+2x+4 in the form (x+a)^2 + b, hence find the stationary point of the curve.


Factorise x^2+3x-4=0