alfers101
Quadratic Equation:
(x4)(x6)=2



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terenzreignz
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You're supposed to find x, am I right? :)

alfers101
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haha i dont know :) i think yes?

terenzreignz
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Well, perform the FOIL method on (x4)(x6).
You get...?

alfers101
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what will you do with 2?

terenzreignz
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Patience :)
FOIL method on the lefthandside
you get
x²  10x + 24
right?

alfers101
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yes

terenzreignz
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so...
x²  10x + 24 = 2
Now you can more clearly see what to do with the 2, am I right? ;)

GaLm
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.....

GaLm
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you cant find x

alfers101
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then what is it?

GaLm
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use FOIL

GaLm
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know what that is?

alfers101
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yes. i got x^210x+24=2

alfers101
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then whats next?

terenzreignz
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Now add 2 to both sides

alfers101
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what?

terenzreignz
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Well, transpose 2, from the right side to the left...
x²  10x + 22 = 0

alfers101
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oohh i get it. then what?

terenzreignz
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Use the quadratic formula. Everything falls into place.

alfers101
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i really cant. please help me :(

terenzreignz
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Given your equation in the form
ax² + bx + c = 0
Your x values are given by
\[\huge \frac{b \ \pm \ \sqrt{b^24ac}}{2a}\]

terenzreignz
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Plug in and solve.

alfers101
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what is my a ? my b is 10? my c is 24 ?

alfers101
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i mean my c is 20?

terenzreignz
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your b is 10
not just 10
a is 1, as there is no coefficient.

terenzreignz
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c is 22, not 24. Look again.

alfers101
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oh okay :)
then whats next?

alfers101
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ill just solve it?

terenzreignz
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Yep.

alfers101
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i think we're going to do a standard equation not quadratic equation?!

alfers101
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standard form rather