Question

If alpha and beta are the roots of equation X square + 7 x + 10 is equal to zero then find the value of Alpha by beta + beta by Alpha

Answer 1

Answer:

α,β are roots of k

2

−7x+10=0

x

2

−2x−5x+10=0

x(x−2)−5(x−2)=0

⇒(x−2)(x−5)=0

⇒x=2,5

α=2,β=5

αβ

2α+3β

=

2×5

2(2)+3(5)

=

10

19