How do I expand (x-2)(3x+3) into a quadratic?
The expansion of two brackets containing two terms each is a little more complicated than expanding say, x(3x+3). There is a process to follow for these questions. First, just look at the x term in the first bracket and consider x(3x+3) which gives: 3x2+3x. Next, look at the -2 term in the first bracket giving: -6x-6. Adding these two results together will give the full result: 3x2+3x-6x-6. This then simplifies to 3x2-3x-6.
WP
Related Maths GCSE answers
All answers ▸A is (2,12) and B is (8,2). What is the midpoint of AB?
Josie is paid £1200 per month. She is going to receive an increase of 4% in the amount she is paid. Work out how much money Josie we be paid each month after the increase.
(Q20 Non-Calculator paper, Higher Tier) Solve algebraically the simultaneous equations: x^2 + y^2 = 25 and y – 3x = 13
Finding Roots of Quadratic Equations