Problem Solving

[vladmire]

What type of question is this? Looks like foil method should be used but I'm still getting lost

If a = 1 and b = -2, then (2a^2 + b)(x + y) + (a + b)(x-y) =

0
2x
y-x
x-y
x+y

[moonlite]

I pluged in the values for a and b and got C as the answer
what is the OA?

[Nidhi Jain]

My calculations says Y-X i.e. C.
What is OA?

[vladmire]

answer is c, but how do I work out the second set of terms? (1+2)(x-y)?

[stop@800]

What type of question is this? Looks like foil method should be used but I'm still getting lost

What is this fiol method??

If a = 1 and b = -2, then (2a^2 + b)(x + y) + (a + b)(x-y) =

0
2x
y-x
x-y
x+y

[dmateer25]

What type of question is this? Looks like foil method should be used but I'm still getting lost

What is this fiol method??

If a = 1 and b = -2, then (2a^2 + b)(x + y) + (a + b)(x-y) =

0
2x
y-x
x-y
x+y

First, Inner, Outer, Last

You know how to do it, maybe just never heard it referred to as that. Here is an example:

(x+2)(x+3)
x^2 + 2x + 3x + 6

[cramya]

Stop@800, Foil is just kaplan's stratgey of how we should mutliply 2 terms for eg

(a+b) (a-b). Its nothing more than that.

answer is c, but how do I work out the second set of terms? (1+2)(x-y)?

This should be (1-2) (x-y) which will make it y-x[/quote]