Does the sq. root of 3-x^2 times the sq. root of 3-x^2 or the sq. root of 3+x^2 equal 3-x^2?

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I'm having a brain fart, and can't find the answer in any of my textbooks!

2007-08-20 18:20:38 · 4 answers · asked by lyridia 1 in Science & Mathematics ➔ Mathematics

√(3 - x²) × √(3 - x²) = 3 - x²

Yep. This doesn't:

√(3 - x²) × √(3 + x²) ≠ 3 - x²

2007-08-20 20:46:00 · answer #1 · answered by The Glorious S.O.B. 7 · 0⤊ 0⤋

(√(3 - x^2))^2 = 3 - x^2

2007-08-20 18:32:04 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋

sqrt(3 - x^2) * sqrt(3 - x^2) = 3 - x^2

2007-08-20 18:30:50 · answer #3 · answered by Matthew G 1 · 0⤊ 0⤋

I cant understand the grammar

2007-08-20 18:28:27 · answer #4 · answered by Sqider 2 · 0⤊ 0⤋