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Chapter 8: Q. 12 (page 917)

In the following exercises, evaluate the rational expression for the given values.

b2+2b2-3b-4(a)b=0(b)b=2(c)b=-2

Short Answer

Expert verified

The required answers are

Part(a)-12Part(b)-1Part(c)1

Step by step solution

01

Part(a) Step 1. Given Information  

The given expression isb2+2b2-3b-4

02

Part (a) Step 2. Calculation   

Substitute 0 for b,

b2+2b2-3b-4=(0)2+2(0)2-3(0)-4=2-4=-12

03

Part (b) Step 1. Calculation    

Substitute 2 for b,

b2+2b2-3b-4=(2)2+2(2)2-3(2)-4=4+24-6-4=6-6=-1

04

Part (c) Step 1. Calculation  

Substitute -2 for b,

b2+2b2-3b-4=(-2)2+2(-2)2-3(-2)-4=4+24+6-4=66=1

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