How would one multiply out brackets?

If asked to multiply out a set of brackets, one must remember to multiply each term in a set of brackets by every term in the other set of brackets. For example, (x+2)(x-4) = x2+2x-4x-8 = x2-2x+8. An incorrect answer would be x2+2x-4 where I have erroneously only multiplied the first term in the second bracket by the first bracket.

AR

Related Maths GCSE answers

All answers ▸

If L1 is y = 3x + 15 and L2 is 3y + 20 = 9x show whether or not L1 and L2 are parallel.


f is a function such that f(x)=2/(3x-3) Find the inverse function and ff^-1


Clare buys some shares for $50x. Later, she sells the shares for $(600 + 5x). She makes a profit of x% (a) Show that x^2 + 90x − 1200 = 0


How do I calculate the gradient of a non linear equation at a given point?