Question 231256
I'll take a stab at them
{{{sqrt(w-9) = 8}}}
sqare both sides
{{{w-9 = 64}}}
Add {{{9}}} to both sides
{{{w = 73}}}
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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({{{-64}}}) = {{{-4}}} because
{{{(-4)*(-4)*(-4) = -64}}}
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cube root({{{16}}}) = cube root({{{8*2}}})
cube root({{{16}}}) = cube root({{{8}}}) x cube root({{{2}}})
cube root({{{16}}}) = {{{2}}} x cube root({{{2}}})
This is because {{{8 = 2*2*2}}}