Grade 12Algebra
3 Answers
bharat bajaj
Discriminant = b^2 - 4ac
As a>0 , b<0 and c<0
D > 0 , Hence we have two roots. So it could be A or B.
Now, the product of the roots = c/a
Product is negative. Hence, one root is positive and one is negative. Hence, the answer is (B)
Thanks
As a>0 , b<0 and c<0
D > 0 , Hence we have two roots. So it could be A or B.
Now, the product of the roots = c/a
Product is negative. Hence, one root is positive and one is negative. Hence, the answer is (B)
Thanks
Bharat Bajaj
IIT Delhi
IIT Delhi
askiitians faculty
Sher Mohammad
x^2-2px+8p-15
let roots are a, bcase 1: one root is between (0,1) and another root is greater than 2
ab=8p-15 >=0 imply p>15/8
a+b=2p >2 imply p>1
p belongs (1,inf)
case 2: one root is less than <0 and another root is greater than 2
ab=8p-15<0 imply p<15/8
a+b=2p <2 imply <1
(-inf, 15/8)
hence d is the correct answer
sher mohammad
b.tech, iit delhi
mycroft holmes
Since a>0, the graph is upward facing. Also f(0) <0. Hence (B) is correct
Other Related Questions on algebra
How do you write “the product of 18 and q” as an algebraic expression?
How do you write “the product of 18 and q” as an algebraic expression?
algebra
Last Activity: 2 Years ago