Exercise 14 Page 56

Let's substitute x= 34 in the expression and then simplify. Remember to carefully follow the order of operations. We will start with rewriting given fraction as a decimal because we are asked to express the answer in decimal.

4x^2+2x-1

Substitute

x= 3/4

4( 3/4)^2+2( 3/4)-1

WriteDec

Write as a decimal

4(0.75)^2+2(0.75)-1

CalcPow

Calculate power

4(0.5625)+2(0.75)-1

Multiply

Multiply

2.25+1.5-1

AddTerms

Add terms

3.75-1

SubTerm

Subtract term

2.75