Solve:
-3sqrt(x+7)+10= -1 for x

Question

anonymous · Answer

is x plus 7 plus 10 all in a square root?

anonymous · Answer

no, just the x+7

anonymous · Answer

okay.are they looking for a decimal answer or an answer that allows a square root?

anonymous · Answer

just the x no square root i think :)

anonymous · Answer

oh i see i see. i thought it said x = -1

hero · Answer

Graphic girl, I answered your question

anonymous · Answer

Try to check it again Hero :)

hero · Answer

Graphic girl, what makes you think that F = 3?

hero · Answer

You can't just divide 6/2

The 2 is being raised to a power

anonymous · Answer

I know. we're supposed to simplify. like make it 6= 2 x 3 over 2 x 2^6

hero · Answer

The only way to re-write it is like this: $$6 \dot\ 2^{-7}$$

anonymous · Answer

giaxlove. x should be about 6.4

anonymous · Answer

thnxs :)

anonymous · Answer

ooh that makes sense but i don't know why my online program says it's 3 times....etc etc

anonymous · Answer

ohhhh i know whaat it is!

hero · Answer

If you did it that way then it would be 3*2^-6

anonymous · Answer

it's 3 times 2^-6

anonymous · Answer

mmm.... graphic girl its wrong :(

hero · Answer

I think my original answer is most correct though. Your online program failed

anonymous · Answer

thnxs for trying anyways

anonymous · Answer

haha no cuz it wanted it simplifieeed. and i got it right! yay thanks for your help hero :).


giax love---i was wrong? what is the correct answer supposed to be?

hero · Answer

Simplification step was unnecessary

anonymous · Answer

*shrugs* thats what it asked for heh. but yea i completely see your view too.

hero · Answer

Glad I was able to help you

anonymous · Answer

ugh won't let me post! but um yeah idk the answer, which is why i'm here lol asking for help :)

anonymous · Answer

giaxlove. this is how i solved it. I subtracted the 10 from both sides. then i squared both sides. then i simplified

anonymous · Answer

ok so i got to the part where its sqrt(x=7)==11/3 then i'm stuck

anonymous · Answer

so i went to -3sqrt(x+7) +10= -1    to -3sqrt(x+7) = -11    to   9(x+7) = 121 and then to 9x +63 = 121 and then...you know the rest

anonymous · Answer

huh?  whered you get the 9?

anonymous · Answer

she got the 9 by squaring both sides of the equation