Characterize the roots of the following quadratic equations using the discriminant
x²+5x+4=0
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We know,
- If discriminant (of an quadratic equation) is equal to 0, then, roots of the equation is real and equal numbers.
- If discriminant (of an quadratic equation) is less than 0, then, roots of the equation is non-real numbers.
- If discriminant (of an quadratic equation) is more than 0, then, roots of the equation is two real and distinct numbers.
Given,
- It is of the form ax² + bx + c = 0
So,
- a = 1, b = 5, and c = 4
Here,
As,
- Discriminant is √41 or 6.4 (approximate value) i.e. more than zero, so the equation has two real & distinct roots.
Thus,
- x² + 5x + 4 = 0 has two real roots.
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