solve (x+2)^2=5?

1 ⤊

2007-12-23 06:18:35 · 2 answers · asked by blue_eyed_woman_23 3 in Science & Mathematics ➔ Mathematics

would the answer be -2+/-sqrt5?

2007-12-23 08:31:47 · update #1

2 answers

Step 1. Since you have equation in a U^2 = K form, where U=x+2, take square roots of both sides. Remember that this step yields both +/- sqrt(5).

Step 2. Subtract 2 from both sides.

2007-12-23 06:26:30 · answer #1 · answered by cattbarf 7 · 0⤊ 0⤋

x+2 = SQRT(5) or -SQRT(5)

x = SQRT(5) - 2 or -SQRT(5) - 2

2007-12-23 06:25:11 · answer #2 · answered by lhvinny 7 · 1⤊ 0⤋