cuberoot(x) -5=3 answer?
2007-08-04 11:37:20 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
cube root x can be written as x^(1/3)
x^(1/3) - 5 = 3
add 5 for both sides
x^(1/3) = 8
take a third exponent for both sides
x = 512
2007-08-04 11:40:53 · answer #1 · answered by 7 · 0⤊ 0⤋
cuberoot of x-5=3
cuberoot of x-5+5=3+5
cuberoot of x=8
(Cuberoot of x)^3=8^3
x=8^3
x=512
2007-08-04 20:46:32 · answer #2 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
Hello!
cuberoot(x) - 5 = 3
cuberoot(x) = 8
raise both sides to the power of 3
x = 8^3
Therefore x = 512
Hope it explains!
2007-08-04 19:30:54 · answer #3 · answered by Nick 2 · 0⤊ 0⤋
Hey there!
Here's the answer.
cbrt(x)-5=3 --> Write the problem.
cbrt(x)=8 --> Add 5 to both sides of the equation.
x=512 Cube both sides of the equation.
Check to find any extraneous solutions.
cbrt(512)-5=3 -->
8-5=3 -->
3=3, true.
Since the check satisfies the equation, the answer is x=512.
Hope it helps!
2007-08-04 18:52:52 · answer #4 · answered by ? 6 · 0⤊ 0⤋
3âx - 5 = 3
x = 3 + 5
3âx = 8
Then:
8^3 = 512
Answer: x = 512
2007-08-08 01:24:55 · answer #5 · answered by Jun Agruda 7 · 2⤊ 0⤋