Quadratic Equation
Quadratic Equation
Only if it can be put in the form ax2 + bx + c = 0, and a is not zero.
The name comes from "quad" meaning square, as the variable is squared (in other words x2).
The solution(s) to a quadratic equation can be calculated using the Quadratic Formula:
The "±" means we need to do a plus AND a minus, so there are normally TWO solutions !
The blue part (b2 - 4ac) is called the "discriminant", because it can "discriminate" between the possible types of answer:
- when it is positive, we get two real solutions,
- when it is zero we get just ONE solution,
- when it is negative we get complex solutions.
Остання версія: четвер, 23 квітень 2020, 13:04