Write each expression below in radical form and compute the value without using a calculator.
a. 25 5/2
b. 81 7/4

Assuming that an exponentiation sign is missing, all you need to know is that rational exponents work like this:

So, you have

And similarly,

step-by-step explanation:

quartic functions has x = –1 and x = –2 as its only two real zeroes:

f(x) = a(x+2)(x+1)   a: real number