Hello,
Can someone please explain to me step-by-step how this answer comes about?
Problem: 12 - 3 √x - 5 = 0
Answer: 21
I know that I am to isolate the square root by itself on one side of the equation, and then square both sides. Then just solve. I have tried that, but no matter what, I am getting all numbers except 21. Can someone please help explain this to me?
Thank you very much!!
2007-01-18 13:33:08 · 3 answers · asked by lilies_n 1 in Education & Reference ➔ Homework Help
combine like terms then get them over to the other side of the equal sign
7-3sqrx=0
-3sqrx=-7
sqrx=7/3
x=49/9
hmmm
no 21 here anywhere
idk
2007-01-18 13:45:54 · answer #1 · answered by mike c 5 · 0⤊ 0⤋
12 - 3 âx - 5 = 0
3 âx - 5 =12
âx - 5 = 4
x-5 = 16
x=21
2007-01-18 21:36:29 · answer #2 · answered by Al 2 · 1⤊ 1⤋
it is 40
2007-01-18 21:46:08 · answer #3 · answered by XoAngieXo 3 · 0⤊ 1⤋