The known equation (k2-1) x2 + (K + 1) x + (k-7) y = K + 2=______ When k, the equation is linear=______ &The equation is a quadratic equation of two variables

The known equation (k2-1) x2 + (K + 1) x + (k-7) y = K + 2=______ When k, the equation is linear=______ &The equation is a quadratic equation of two variables

Since the equation does not indicate whether it is about X or Y, we should refer to the equation of first degree with respect to X or y. when k2-1 = 0 and K + 1 = 0, the equation is the equation of first degree with respect to y, and the solution is k = - 1. When k2-1 = 0 and K + 1 ≠ 0, the equation is the equation of second degree with respect to y, and the solution is k = 1. So the answer is: - 1,1