What is the nature of the roots of the quadratic equation $x^2

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What is the nature of the roots of the quadratic equation

x^2 - 5x + 7 = 0

ANot real

BReal, rational, equal

CReal, irrational, unequal

DReal, rational, unequal

Answer:

$=b^2-4ac$

$=-5^2-4\times 1\times7$

$=25-28=-3$

this is negative so the roots are not real

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