# alg

posted by .

i need help solving this one (x + 4)^2/3= 9 a) 13 b) 23;-31 c) 5 d) 31;-31

also sove check for extraneous solutions
(6x-5)^1/2 = (7+ 4x)^1/2
a) 1/6 b) -9 c) 6 or d) 1/5

• alg -

(x + 4)^2/3= 9
[(x + 4)^2/3]^(3/2)= 9^(3/2)

x+4 = 27
x = 23

do the second one by squaring both sides

• alg -

ok so for this one i need help solving this one (x + 4)^2/3= 9 a) 13 b) 23;-31 c) 5 d) 31;-31
it would be c 23 or -31 right?
for for the 2nd one i got -9?
but i don't think i did it right

## Similar Questions

1. ### algebra

I need help with: solving and check for extraneous solutions. sqrt y+9=1
2. ### alg

i need help solving this one (x + 4)^2/3= 9 a) 13 b) 23;-31 c) 5 d) 31;-31 also sove check for extraneous solutions (6x-5)^1/2 = (7+ 4x)^1/2 a) 1/6 b) -9 c) 6 or d) 1/5
3. ### trig

I need to find all solutions of the given equations for the indicated interval. Round solutions to three decimal places if necessary. 1.) 3sin(x)+1=0, x within [0,2pi) 2.) 2sin(sq'd)(x)+cos(x)-1=0, x within R 3.) 4sin(sq'd)(x)-4sin(x)-1=0, …
4. ### algebra

what are extraneous solutions of an equation?
5. ### Alg 2

Solve the equation. Check for extraneous solutions. 10 ln 100x - 3 = 117 Thank you in advanced
6. ### Alg 2

Solve the equation. Check for extraneous solutions. ln x + ln(x-2) = 1
7. ### Precalculus

Solve (log x)^2 = log x Also, when will their be a possibility that an equation will have an extraneous solution?
8. ### Alg 2

check for extraneous solutions. 0, 7^4 2^4, inside the equation x^5/6 = 9x^7/12 - 14x^1/3
9. ### Math-Clarification

Identify any real and extraneous solutions for the equations below. Sqrt p = -1 So, would this have no real or extraneous solutions?