Use the interactive display to see
how the expression (ax+b)(cx+d) is multiplied out. You can change the quadratic
function and then see the process, step by step.
Summary
Multiplying
out brackets is such an important part of A Level mathematics. You must
practise until you can do it quickly, accurately and reliably.
make sure you always leave your answer
in the form ax2+bx+c
remember: (a+b)2 =
a2+2ab+b2 - not
a2+b2
this topic is part of the AS/A2
background knowledge