i have to simplify [sqrt(17)+sqrt(7)]*[sqrt(17)-sqrt(7)]

does that mean multiply it out? how do i do that?

i have to simplify [sqrt(17)+sqrt(7)]*[sqrt(17)-sqrt(7)]

does that mean multiply it out? how do i do that?

does that mean multiply it out? how do i do that?

- stapel_eliz
**Posts:**1733**Joined:**Mon Dec 08, 2008 4:22 pm-
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buddy wrote:simplify [sqrt(17)+sqrt(7)]*[sqrt(17)-sqrt(7)]

Yes, you need to multiply this out. But it's a pretty simple thing to do, if you recognize that this is the factored form of

. . . . .

Letting and , what do you get?

- stapel_eliz
**Posts:**1733**Joined:**Mon Dec 08, 2008 4:22 pm-
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