Question: 4 Show that: a 2x2 - 4x + 7 is positive definite b -2x2 + 3x - 4 is negative definite c x2 - 3x

4 Show that: a 2x2 - 4x + 7 is positive

4 Show that: a 2x2 - 4x + 7 is positive definite b -2x2 + 3x - 4 is negative definite c x2 - 3x + 6 > 0 for all r d 4x - 22 - 6

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