Expand and simplify: (2x+3)(x-8)

For this kind of question, the FOIL method can be used. You start by multiplying the FIRST aspects of both brackets, in this case giving 2x². Then you do the same with the OUTERS, the last elements in each bracket, giving -16x. Then you multiply the two INNER numbers in the brackets, giving 3x. The LASTERS can then be multiplied out, giving -24. When written out, this would give the expanded equation 2x²-16x+3x-24. This can be simplified by combining the like terms, in this example the terms both containing an x. This gives the final equation and answer 2x²-13x-24.

GC

Related Maths GCSE answers

All answers ▸

Solve the simultaneous equations (1) 2a - 5b = 11 (2) 3a + 2b = 7


All tickets for a concert are the same price. Ayo and Rachel pay £63 total for some tickets. Ayo pays £24.50 for 7 tickets. How many tickets does Rachel buy?


There are 13 counters in a bag. 4 counters are red, the rest are blue. Alice takes 2 counters without replacing them. What is the probability that both counters are the same colour?


I don't understand how to expand and simplify brackets such as (x-3)(x+5)