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ok so there are 3 ways to solve a quadratic equation:
2. quadratic equation
3. complete the square
a quad usually in the form ax^2 + bx + c = y
c is any number and a and b are the coefficients of x
6x2 + 9x=? how to do?? i want xplaination ? can u pls elp? :)
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How to solve for x you mean? :o
Or likeeee, how to graph and all that jazz? :D
ya for x!
ok here's an example : x^2 + 5x + 6 = 0
one way to solve is to see what 2 numbers when multiplied equal 6, and when added equal 5.
well 2x3=6, and 2+3 = 5
so this equation can also be written as x^2 + 2x + 3x + 6 = 0
now, we can factor it : x(x+2) + 3(x+2) = 0
and now we have (x+2) two times. in other words, both terms have an (x+2) in common
so we can factor that out aswell: (x+2) (x+3) = 0
here, since multiplying these two together results in 0; that means either one of these can equal 0.
because if you multiply a number by 0, you get 0,
what i'm saying is: x+2 = 0, x+3=0
so then x=-2, x=-3
quadratic equations always have 2 answers.
Wow i didn't think you were going to say anything, you were writing for like 10 minutes lol.
hahaha yeah i backspaced a bunch of stuff and started over
oh that actually made sense? lol ok
wht do ya mean by tht? :O
oh nothing i just thought my explanation might have been confusing