Can you please explain how to expand two brackets, eg. (3x-7)(5x+6)
When I am expanding brackets I use the acronym FOIL and simplify. You begin by multiply the first term (F) in each bracket, followed by multiplying the outside terms (O), then the inside terms (I) and finally the last terms (L) in each bracket. Once the brackets have been expanded, it might be possible to simplify this expression. Answers should always be left in the simplest form.(3x-7)(5x+6)=3x(5x)+3x(6)+(-7)(5x)+(-7)(6)=15x2+18x-35x-42=15x2-17x-42
Related Maths A Level answers
All answers ▸(The question is too long so it's marked at the top of the answer space, sorry for any inconveniences)
A cricket player is capable of throwing a ball at velocity v. Neglecting air resistance, what angle from the horizontal should they throw at to achieve maximum distance before contact with the ground? How far is that distance?
Integration question 1 - C1 2016 edexcel
Integrate tan(x)^2 with respect to x