1. To square an expression means to multiply that expression by itself. So this is equal to (ax+b)(ax+b). Can you FOIL this expression?
2. Leave the 4 outside, and FOIL the two binomials. Give it a shot and let's see how you do.
Hi guys not sure how to approach these questions would appreciate being pointed in the right direction
Question:
Expand the following expressions, collecting together like terms where possible;
1. (ax + b) ^2
2. 4(x/2 - 3 ) (7y - x)
Thanks in advance
Just some silly errors. If I have then this is (because the order of multiplication doesn't matter) which is the same as So this is the change you need to make:
(don't use brackets for addition!)
Otherwise, it's fine. Be careful with how you set your work out, try and follow my example above for the second problem, and just be cautious where you put brackets (implying multiplication) and plus signs (obviously for addition).
Thanks for the advice it was a pretty stupid mistake....the 2nd expression is also proving kind of tricky its different to all the previous exercises that I've attempted prior but here is a long shot at it:
4 (x/2 - 3) (7y - x)
= 4 (x/2.7y - x^2/2 - 21y - 3x)
Dont know whether to multiply everything in the brackets by the 4 outside or even if whats in the brackets is correct...help would be much appreciated