Question

Fie ecuatia $\left|\begin{array}{ccc} x^{2} -1&1\\x&4\\\end{array}\right|$=$5 \left|\begin{array}{ccc}x&x-1\\2&x\\\end{array}\right| \left$ cu solutiile x1,x2, x1<x2. Daca α=7$x_{1} ^{2} -2 x_{2} ^{2}$, atunci:
a)α=28
b)α=-70
c)α=-98
d)α=70

Answer 1

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