Plz... solve this..
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alpha+beta is -5/2 and alpha*beta is k/2
put both the value to satisfy the equation
alpha²+beta²+alpha*beta=21/4
(alpha+beta)²+alpha*beta=21/4
(-5/2)²+k/2=21/4
10/4+k/2=21/4
10+2k/4=21/4. ( LCM taken)
cross multiplication
40+8k=84
8k=84-40
8k=44
k=44/8
put both the value to satisfy the equation
alpha²+beta²+alpha*beta=21/4
(alpha+beta)²+alpha*beta=21/4
(-5/2)²+k/2=21/4
10/4+k/2=21/4
10+2k/4=21/4. ( LCM taken)
cross multiplication
40+8k=84
8k=84-40
8k=44
k=44/8
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