Homework Help: Algebra

Posted by Junior on Tuesday, January 27, 2009 at 7:34pm.

I need help solving this equation.

[SQRT(x + 3)] - [SQRT(x - 2)] =1

I know I am supposed to square each side however my teacher tells me I ahve to foil the lefthand side of the equation. Cna someone please help me with this.

Thank you.

Algebra - bobpursley, Tuesday, January 27, 2009 at 8:12pm
well, if you square both sides

you get (FOIL)
x+3-2sqrt(x-2)sqrt(x+3) + x-2=1
2x+2- 2sqrt( x^2+x-6)=1
or 2x+2-2=2sqrt(x^2+x-6)
square both sides
4x^2=4(x^2+x-6)
x=6
Algebra - Junior, Tuesday, January 27, 2009 at 8:30pm
Thank you.
Algebra - Junior, Tuesday, January 27, 2009 at 8:33pm
Would I do the same thing with this equation?

[SQRT(x + 7)] - 2[SQRT(x)] =-2

Beacause I see what you have showed me BUt i am stll a little bit confused. Please if you have the time help me. Thank you.
wgbs kjtenv - wgbs kjtenv, Sunday, February 1, 2009 at 7:41pm
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