Please help me with this
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Step-by-step explanation:
let alfa = a , beta = b
so a+b = 8/7
and a.b = k/7
(a+b)^2= a^2 + b^2 + 2ab
so a.a + b.b = 64/49 - 2k/7
given is , a-b =2
so (a-b)^2 = a.a -2ab +b.b
so 4 = 64/49-2k/7 -2k/7
so 4k/7 = 64/49- 4
so k = -(132*7/ 49*4)
so k = -33/7
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