1-20 evaluate the expression below of the given values. if you can explain it to me i’m so appreciated

a) -8

b) -56

c) 3

d) 6

Step-by-step explanation:

(a). The expression is given by,

Now, substitute the the value of x = 3 in the expression

(b). The expression is given by,

Now, substitute the the value of x = -2 in the expression

(c). The expression is given by,

Now, substitute the the value of k = -3 in the expression

(d). The expression is given by,

Now, substitute the the value of m = 1 and n = 2 in the expression

Hence, This is the required solution.