Question

solve: (x+7)^(2/3)=9

Answer 1

take (3/2) of both side

Answer 2

there's availability for 2 answers though

Answer 3

\[(x+7)=9^{\frac{3}{2}}\]

Answer 4

yes because you don't know whether the you have 27 or -27

Answer 5

x+7=9^(3/2)
x+7=27
x=20

Answer 6

so there are to possiblities

Answer 7

namely that
\[x+7=27\]
or
\[x+7=-27\]
first one gives
\[x=20\] second one gives
\[x=-34\]

Answer 8

left hand side of your equation says the cube root of x+7 squared. if x = -34 then x + 7 = -27. if you take the cube root you get -3.. square gives you 9. that is why you have two answers

Answer 9

hope that is clear