Expand and simplify (x+4)(x-3)
We need to multiply out each bracket and it is best to do this systematically, multiplying each term in the left hand bracket by each term in the right hand bracket. (x+4)(x-3) = (X x X) + (X x -3) + (4 x X) + (4 x -3) = x2 -3x+4x -12 However, this is not our final answer because we still need to simplify our like terms. -3X and 4X are both like terms and so these can be simplified. -3x+4x = x Therefore (x+4)(x-3) = x2+x-12
EM
Related Maths GCSE answers
All answers ▸i) The point A on a graph is (6,-7), and point B is (3,5). Calculate the equation of the straight line that passes through both A and B. ii) Does the line pass through the point C (-2,26)?
Calculate y=4x-6 when x=3
Jill takes out a loan of £6000 to get a car. The loan has a compound interest of 3% and she takes it out for 4 years. a) How much interest has Jill accrued after 2 years? b) What is the total amount to be paid after 4 years?
For any given journey, ABC Taxis charge customers a base fare of £5 plus 80p per mile. XYZ Taxis charge a base fare of £3 plus £1.20 per mile. Find the number of miles, x, that must be traveled in order for ABC taxis to be the cheaper journey option.