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Chapter 1: Expression and formulas (page 16)

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

Short Answer

Expert verified

The value of the expressions for x=3 are:

(a)9

(b)64

(c)40

Step by step solution

01

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.

02

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

The value of the expression is 9.

03

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

The value of the expression is 64.

04

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.

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