Question

Which of the following expresses the possible number of positive real solutions for the polynomial equation shown below 5x^3 + x^2 +7x - 28 = 0
A. Two
B. Three or one
C. One
D. Two or zero

Answer 1

I think option C. One

Answer 2

I think the answer is option c.one

there is only one sign change in the whole equation so possiblythe answe must be one. correct me if i am wrong