Question

Evaluate when x = 3, a. x b. 4^x c.3x² + 4x + 1.

Short answer

The value of the expressions for x=3 are:

(a)9

(b)64

(c)40

Step-by-step solution

Step 1: Given expressions are :a. x  b. 4x  c.3x2 + 4x + 1To evaluate the expression for x=3

Replace the variable x with 3 in order to evaluate the given expressions.

Part (a) Step 1: Evaluate the expression x2 for x=3Replace x with 3 :32=9

The value of the expression is 9.

Part(b) Step 1:Evaluate the expression 4x for x=3Replace x with 3 :43=64

The value of the expression is 64.

Part (c) Step 1:Evaluate the expression 3x2 +4x+1 for x=3Replace x with 3 :3(3)2+4(3)+1=27+12+1=40

The value of the expression is 40.