solve for P: 7 – sqrt(P+3) = 5?

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solve for P: 7 – sqrt(P+3) = 5?

2007-08-06 13:53:08 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

3 answers

First, subtract 7 from both sides:

7 - sqrt(P+3) = 5
-sqrt(P+3) = 5 - 7
-sqrt(P+3) = -2

Multiply by -1 to clean it up:

sqrt(P+3) = 2

Square both sides:

sqrt(P+3)^2 = 2^2
P+3 = 4

Subtract 3 from both sides:

P = 4 - 3
P = 1

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Now, check the answer:

7 - sqrt(P+3) = 5
7 - sqrt(1+3) =? 5
7 - sqrt(4) =? 5
7 - 2 =? 5
5 = 5

2007-08-06 13:56:14 · answer #1 · answered by McFate 7 · 0⤊ 0⤋

-sqrt(p+3)=5-7=-2
sqrt(p+3)=2
p+3=4
p=1
check: 7-sqrt(1+3)=5
7-2=5

2007-08-06 13:59:47 · answer #2 · answered by cidyah 7 · 0⤊ 0⤋

7-sqrt(P+3)=5
2=sqrt(P+3)
P+3=4
P=1ANS.

2007-08-06 13:58:41 · answer #3 · answered by Anonymous · 0⤊ 0⤋