Question

I tried to solve this and got 5 which isn't a option on the multiple choice...
"Solve square root of the quantity two x plus three equals x plus one for x"
A:2
B:+or-radical 2
C:radical 2
D:4

Please help!

Answer 1

sqrt(2x + 3) = x + 1

square both sides

2x + 3 = (x + 1)^2

Answer 2

2x + 3 = x^2 + 2x + 1

0 = x^2 - 2
can you finish this off?

Answer 3

I don't think I can finish it. I don't understand these at all

Answer 4

x^2 = 2

now to get x you take the square root of both sides

Answer 5

so the answer is A?

Answer 6

no x^2 = 2

square root of x^2 = x

therefore x = +/- square root of 2

or as you say in the states +/- radical 2

Answer 7

okay thank you!!!!

Answer 8

yw