Question

(s+2/5t^2) ^2 for s =2 and t=5

Answer 1

Answer:

144

Step-by-step explanation:

First plug in the variables, which should get you [2 + 2/5(5^2)]^2. Now simplify this expression and you should get [2 + 2/5(25)]^2 After another simplification step, the resulting expression should be (2 + 50/2)^2 which is just (2 + 10)^2. Finally, we can solve inside the brackets which gets us (12)^2.   12^2 is just 12 to the power of 2, or 12 * 12 as the power denotes how many times it multiplies itself. 12*12 is 144, which is our answer.

Note: Something that many people learn in later algebra is negative powers and fractional powers. Sometimes even log, but right now I won't get into that.