The expression, b2 – 4ac, is called the discriminant of the quadratic equation. The discriminant tells us how many solutions an equation has. The quadratic equation ax2 + bx + c = 0 has: two real roots when b2 – 4ac > 0 ex. x2 – 6x + 5 = 0 (-62 ) – 4(1)(5) 36 – 20…
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