Question

If a and B are the zeroes of the quadratic polynomial x2 + 5x + 4 then a - B = ?
(A) 3
(B) = 4
(C) 0
(D) 5​

Answer 1

Answer:

(1/a+1/b) can be written as( a+b)/ ab by taking the LCM so the second part now becomes{(a+b)/ab } - 2 ab

we have ab=4 and a+b =-5 Now simply substitute {-5/4}-2X4

=(-5/4)-8=-(37/4) will be the answer.

another way is also there, we can easily calculate a and b as -4 and -1. Now substitute this to the equation (1/a + 1/b) –2a b

Answer 2

Answer:

here is your answer....... .....