Question

if D is determinant the what is the nature if D=0?​

Answer 1

Answer:

If D = 0 then the equation would have real and equal roots.

Answer 2

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If D = 0 then Cramer Rule fails, as the determinant of the coefficient array is zero. Consequently, the system of equations then has either infinitely many solutions or no solutions. In terms of Cramer's Rule, "D = 0" means that you'll have to use some other method to solve the system.

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