Solve. x2 = 10x – 20

Question

anonymous · Answer

http://www.wolframalpha.com/input/?i=x2+%3D+10x+%E2%80%93+20

anonymous · Answer

thank you

anonymous · Answer

Hey, baby. Probably the simplest way for you to do this problem is to simple move everything to one side of the equation to get
x^2-10x+20 =0
and then use the quadratic formula.

anonymous · Answer

anyone want to do another?

hba · Answer

the other way is to break the middle term

anonymous · Answer

Solve. 3x2 = –15x + 21

anonymous · Answer

Hey, Ken. As awesome as it is that alpha will do this for you, let me show you how to solve it on your own.

anonymous · Answer

First, get everything to one side;
3x^2 +15x -21 = 0
Then we can use the quadratic formula.
A=3 B=15 C=-21
Plug those into the formula
$$\Large x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$$

jiteshmeghwal9 · Answer

Take 10x-20 at L.H.S.as$$x^2-10x-20=0$$now it becomes quadratic Equation so$$-(-10) \pm \sqrt{(-10)^2-4(1)(-20)}\over 2(1)$$now solve it & gt ur answer:)

jiteshmeghwal9 · Answer

$$10 \pm \sqrt{10+80}\over2$$$$10 \pm \sqrt{90}\over 2$$