new topic started today: the quadratic polynomial
its pretty straight forward, today we just went through dot points and the basics, revision from all that parabola stuff we did earlier in the year.
man i did not miss them -.-
take forever to do.. so much space
anyway.. terms we have to get to know and use properly:
monic - quadratic where the value before x^2 is 1
coeffcient - the number before the pronumeral basically
leading term - the term with the highest power (x^2)
constant term - the one with no pronumeral
root - x co-ordinates where y = 0 (ie. the x-intercept)
zero - the same thing as root
we all know the quadratic funcion:
y = ax^2 + bx + c
got it memorized?
and if the coeffcient of x^2 is positive, the graph will be concave up, if negative it'll be concave down.
note that as the coeffcient of x^2 gets larger, the graph becomes narrower, and as the coefficient becomes smaller, the graph becomes wider
all basic stuff really.
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