Find the discriminant of the quadratic 5x^2 - 2x + 8 - 2x^2 + 6x + 2 - 2x^2 + 4x - 1.
Find the discriminant of the quadratic 5x^2 - 2x + 8 - 2x^2 + 6x + 2 - 2x^2 + 4x - 1.
5x2 – 2x + 8 – 2x2 + 6x + 2 – 2x2 + 4x – 1
combine terms x2 + 8x + 9
when the quadratic is in the form ax2 + bx + c the discriminant is b2 – 4ac
discriminant is 82 – (4)(1)(9) = 64 – 36 = 28
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