how do i solve this using the sqrt property (x+4)^2=81?

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how do i solve this using the sqrt property (x+4)^2=81?

2007-07-28 06:02:29 · 2 answers · asked by deannahndrsn 2 in Science & Mathematics ➔ Other - Science

2 answers

Take a square root of each side and you end up with
(x+4) = +/- 9

Remember the plus and minus when you do this.

Solve for x by
x+4 = 9
x+4 = -9

2007-07-28 06:07:30 · answer #1 · answered by tkquestion 7 · 1⤊ 0⤋

first take the sqrt of both sides causing: X+4= +/- 9
then you must have 2 equations (since there is a plus and a minus)
1.) x+4= 9
2.) x+4= -9

and solve for both..

2007-07-28 14:12:31 · answer #2 · answered by team 2 · 0⤊ 0⤋