The discriminant is -7
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-7
-7 therefore the quadratic equation has no real roots
2X2+5x-12 4+5x-12 -8+5x 5x-8
A quadratic polynomial.
b2 - 4ac (whatever that 4's sign is it is positive when squared ) (4)2 - 4(2)(- 9) 16 + 72 = 88 ===============Two real roots.