Factorise x^2 + 4x +3
First take the 4x - the two numbers that will be +/- to the x in the brackets will need to add to form this number, so the possibilities are 1 and 3 or 2 and 2.Now take the 3 - the two numbers that will be +/- to the x in the brackets will need to multiply to form this number, so 1 and 3.The number in combination in common is 1 and 3, giving us the answer (x+1)(x+3)
JS
Related Maths GCSE answers
All answers ▸How do I multiply two brackets without missing terms when multiplying?
the first four terms in a sequence are 2, 6, 10, 14. what is the nth term? and what is the sum to n terms of the sequence?
solve 15x = 6x^3 + 8x^2
How do I solve sequences and how can I get the nth number?