Question

solve the radical equation √18x-9=x+4

Answer 1

there are a few possible first steps.. what do you think?

Answer 2

square it.

Answer 3

yea,

then it's: 18x-9 = x^2 +8x +16

now what?

Answer 4

add 9

Answer 5

ok,

then it's: 18x = x^2 +8x +25

now what?

Answer 6

subtract 8x?

Answer 7

how is it 0?

Answer 8

opps. lol

Answer 9

lets subtrack 18x...

then it's x^2 -10x + 25

Answer 10

=0

Answer 11

Okay, now factor it ?

Answer 12

totally

Answer 13

(x-5)(x-5)

Answer 14

so my answers 5?

Answer 15

so x = 5

Answer 16

idneeeeed.

Answer 17

thank you!

Answer 18

sure!