1. factorise x^2 - 9 Level 6 KS3, 2. Rearrange a (q-c) = d to make q the subject

1.Here the first task in this is to be able to identify the form of this quadratic polynomiala^2 - b^2This format is called the difference between two squares When you get told to factorise in this form? You must simply arrange it into this form.(a-b)(a+b)the coefficients of x , simply amount to zero ( ba - ba =0) A good way to check your answer is to simply expand the brackets, doing the opposite of factorisation2a/a (q-c) = d/a q-c = d/a d/a + c = q