i do not understand this topic and i need help
is there a easier way to learnt Quadratic Equations?
I think you should play angry birds! No really, we do it in math class all the time. A quadratic equation describes a parabola, which just happens to be the shape of the curve made by the bird as it is sling-shotted through the air. Well, really it is an inverted parabola, and I will get to that in a minute.
Here are quadratics in a nutshell:
- The standard equation lists the terms in descending order with highest power first. Ax2 + Bx + C.
- This form is not particularly useful, except that the sign of A will tell you whether the curve is right side up (concave up) or upside down (think "angry bird in flight") (concave down). If A > 0 the parabola is right side up....
- Oh, and the constant C gives you the y- intercept, just like the constant does in the equation for a line
- Since The "solution", "root" or "zero" of this equation is given by setting the whole thing to zero, we can use the zero multiplicity rule (ZMP) to find out where the function crosses the x axis. The ZMP just says that when you multiply three unknown numbers and you know the product is zero, that one or more of the unknowns must be equal to zero. So either
- A=0 (boring)
- (x-p) = 0 (possibly where the angry bird left the sling shot)
- (x-q) = 0 (where the angry bird will land. Hopefully on those annoying pigs!)