Factorise x^2 + 3x +2
You want two numbers that multiply to give 2 and add to give 3. Looking at factors is always easiest, so start by listing pairs of numbers that multiply together to give 2. There are only two such pairs, 1x2 and (-1)x(-2). The only pair that add together to make 3 is +1+2=3.
So the answer is (x+1)(x+2)
CH
Related Maths GCSE answers
All answers ▸Solve the quadratic inequality x^2+x-6>/= 0.
Calculate the largest share when £400 is shared in the ratio 1 : 2 : 5.
Here is a list of numbers: 15, 9, 12, 13, 6, 15, 18, 10, 11, 21. Find the mean, median and the mode.
Harry drives from Exeter to London in 4 hours at an average speed of 70km/h. Ron drives from Exeter to London in 5 hours. (a) Assuming Ron took the same route as Harry, calculate Ron's average speed.