DelsieSamuel386 DelsieSamuel386

14-07-2015
Mathematics

contestada

Which of the following expressions is a factor of the polynomial x ^ 2 +3/2 x - 1?
a. x-1/2
b. x-2
c. x-1
d. x+3/2

Respuesta :

andreajeanst andreajeanst

14-07-2015

solve by completing the square
x^2 + 3/2x+9/16=25/16
(x+3/4)^2=25/16
(x+3/4)^2-25/16=0
(x+3/4-5/4)(x+3/4+5/4)=0
(x-1/2)(x+2)=0

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