You can
put this solution on YOUR website!I'll take a stab at them
sqare both sides
Add
to both sides
--------------
This one looks like a cube root. When the
cube root is asked for, they are saying:
"What number multiplied by itself 3 times
will give the number under the cube root sign?
cube root(
) =
because
---------------------------------
cube root(
) = cube root(
)
cube root(
) = cube root(
) x cube root(
)
cube root(
) =
x cube root(
)
This is because
You can
put this solution on YOUR website!
1.
Square both sides to remove the square root sign.
(w-9)=64
w=73
2. What you are describing is the 3rd root of -64. Ask yourself, what number when multiplied by itself 3 times, equals -64?
The answer is -4 because (-4)*(-4)*(-4)=-64
Your calculator should have a 3rd root button.
3. Are you sure it wasn't a 4 sqrt sign and 16 inside the sqrt?
I ask because 16 does not have 3rd root that is a rational number.
However, the 4th root of 16 is 2, because 2*2*2*2=16
