Question

-4√x+9=20 what is the answer? please i tried it but im not sure

Answer 1

what answer did you get? also, is the 9 inside the radical?

Answer 2

is it only x under sq rt or (x+9)...?

Answer 3

it doesnt matter, both ways give complex solns

Answer 4

which I am guessing is not what they are after.

Answer 5

no they won't. square root of a number can be negative.

Answer 6

for example -2 can be a root of 4

Answer 7

lol what

Answer 8

irvine, we need your feedback to help you. please respond.

Answer 9

square roots cannot return negative values lol

as soon as you get sqrt(anything ) = negative, theres no soln lol

Answer 10

elecengineer, what is so hard to understand?
\[-4\sqrt(x+9) = 20 \rightarrow \sqrt(x+9) = -5 \rightarrow x+9 = -5^2 \rightarrow x=16\]

Answer 11

sub it back into the original eqn, see if it works :P

Answer 12

-4(5)= 20, whoops

Answer 13

u should be a fan of me :)

Answer 14

ah yes, this is not a function. you are right. we only consider the principal square root. my bad. ignore my answers.

Answer 15

i got 'no solution' as the answer and ya the 9 is in the radical

Answer 16

sorry for not anwsering previously i had to do something else