Evaluate the function at the indicated values. (If an answer is undefined, enter UNDEFINED.)

Question

k(x) = −x² − 5x + 6

 

A.) k(√5)

B.) k(a + 5)

C.) k(−x)

D.) k(x²)

Answer 1

the given function is a quadratic (polynomial) and so it is defined for every Real number.

 

to obtain answers, simply substitute, and simplify the resulting expressions.

Note: the square of k(a+5) will, of course, be k²(a²+10a+25) and you will want to distribute, collect like terms, etc.