The quickest approach is the quadratic formula.
-Dan
I have real problems trying to figure this out, as I was not in class when er learned this. Does anyone know how to??
Ok so here is the question:
21d*d+8d-26= 0
What are the steps that you have to take???
Thank you so much for helping me
seetbinti
The quickest approach is the quadratic formula.
-Dan
now you can factorize this equation or as the above guy said use the quadratic formula, but assuming you don't know it I'll show you the factorizing method !!!
so ,
we can't split middle term so we do it by completing the square or by converting it to the form (a+b)^2 = 0
so, we first transpose -26 to the RHS
so we get
we no divide the whole equation by 21 to x^2 coefficient to a perfect square and 1 is a perfect square.
so we get
can be written as
no we add (4/21)^2 to both sides just to make the whole expression (a^2 + 2ab + b^2)ish
so,
factorizing LHS we get
= PLUS OR MINUS
= PLUS OR MINUS
and thats the solution.
Ice Sync