y = x^2 + 3x + 2 = 0
Factorising gives: y = (x+2)(x+1) = 0. y only equals 0 when (x+2)=0 or (x+1)=0. Therefore x=-2 or x=-1
DT
Related Maths 11 Plus answers
All answers ▸The average age of a group of 6 people is 21. One more person joins the group and the average is now 25. How old is the new member of the group?
How many (1/6)'s are there in 4 & 1/2?
There are 2 green jelly beans, 5 are yellow and 13 are red. Sue picks one jelly bean. What is the possibility that sue pick a jelly bean that is not yellow?
3 eggs cost £4.80 and 4 slices of bread cost £3.00. What is the cost of 1 egg and 1 slice of bread?