Question

What is (x-8)(x+4) + (x-3)(x+9)

Answer 1

(x-8)(x+4)+(x-3)(x+9)

Remove parenthesis.

x-8+x+4+x-3+x+9

Then rearrange.

x+x+x+x+4+9-8-3

Now add/subtract.

4x+13-11

We still have combining to do...

4x+2

That's as far as it goes

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hope it helps