(7 + √2)(8 - 3√2)
(7 + √2)(5√2)
Am I doing this right? If so what do I do after this?

Question

anonymous · Answer

well, if you replace sqr 2 with x, would you be able to subtract it?

anonymous · Answer

you can't do 8-3x, can you?

anonymous · Answer

you have to multiply it out

anonymous · Answer

3-√2? or 50 - 13√2

anonymous · Answer

multiply it out like a regular factored out quadratic equation which by the way has nothing to do with this

anonymous · Answer

I don't get what your saying here. How do I right it out. I do better with visuals instead of explanations.

anonymous · Answer

k, wait a second...

anonymous · Answer

(7+√2)(8-3√2)
56+21√2+8√2+2
56+29√2+2

anonymous · Answer

Wouldn't it be 56 - 21 since the 3 has a - in front of it making it a negative?

anonymous · Answer

oh right, my bad

anonymous · Answer

So it is 56 - 21√2 + 8√2 + 2
I don't understand where the "8√2" comes in because we already used the 8 in "8 · 7 = 56" so don't it cancel it out? or no?

anonymous · Answer

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