Posted in Radio Supplies by admin
on June 29, 2009
How do I get a quadratic equation in standard, vertex, and factored forms with this?
Roots are “p” and “r” and it goes through the point (4,-3).
So far I figured y=(x-p)(x-r) for the start of factor form and plugged in the point but have no where to go from there. Help please?
Actually you should have had:
y=a(x-p)(x-r)
then plug in:
-3 = a ( 4 – p ) ( 4 – r )
so
a = -3 / (( 4 – p ) ( 4 – r ))
now you have:
y = (-3 / (( 4 – p ) ( 4 – r ))) ( x – p )( x – r )
in factored form.
the rest is just a grind
Vertex Standard VX-231 VHF Review
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