Question

Find the value of polynomial 4x^2 -5x +9 , when x= 1/2


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Answer 1

4×(1/2)²-5/2+9

1-5/2+9

15/2

7.5

Answer 2

If x = 1/2

Then,

4(1/2)²-5(1/2)+9

4(1/4)-5/2+9

1-5/2+9

Taking LCM = 2

2/2-5/2-18/2

2-5-18/2

-3-18/2

-21/2