Simplify expression?

(3-2 radical 7)(3 + 2radical 7)

2007-02-24 11:52:18 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

(3-2√7)(3+2√7)

Simplify radicals:

2√7= √28

(3-√28)(3+√28)

Multiply

(9-28)

= -19

2007-02-24 12:02:19 · answer #1 · answered by bluefairy421 4 · 0⤊ 0⤋

(3 - 2sqrt(7))(3 + 2sqrt(7))
9 + 6sqrt(7) - 6sqrt(7) - 4(7)
9 - 28
-19

2007-02-24 20:30:30 · answer #2 · answered by Sherman81 6 · 0⤊ 0⤋

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