There are 30.48 centimeters in a foot
Multiply the numbers outside the square root together and the two square roots together to get a single term and simplify
Use substitution.
anywhere you see "a" , than you would plug in b + 2 in for it so....
(b - (b + 2)^4
now take the negative sign and distribute it "+"
so b - b is 0, than 0 - (-2) is -2.
so what is (-2)^4 ????? it would become positive 16
Maximum. Hope you get it right!!