Question

if a b are zeroes of y^2 -5y +n and a-5b=-7 then n is

Answer 1

Answer:

Its -16/9

Step-by-step explanation:

compare equation with standard form Ay²+By²+C.

Let a and b be the zeroes.

You will get A=1,B=-5,C=n

Now sum of zeroes=-B/A=a+b=5

so a=5-b

Therefore a-5b=-7

5-b-5b=7

b=-1/3 hence a=16/3

Now product of zeroes=C/A=a×b=n=16/3 × -1/3

__________

|so n=-16/9 |