Question

Find a+b and a.b if A and B are the zeros of x^2 + 5 x + ​

Answer 1

Answer:

1433÷46

265÷35

1477×

=12

Answer 2

$\huge{\underline{\mathtt{\red{❥A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}$ANSWER

Since a and b are the zeros of the polynomial f(x)=x 2 −5x+k

The standard quadratic equation is px 2 +qx+r=0

Then Sum of roots = − pq

and Product of roots = pr

Therefore,

a+b=5 and ab=k

Now, a−b=1

(a−b) 2 =1

(a+b) 2 −4ab=1

25−4k=1

24=4k

k=6