Multiplication and division with exponents(also finding square roots)

Question

joshawad · Answer

this is probly the first non-geometric thing they have taught me ini algebra 1 so I have clue as how to do this.

anonymous · Answer

is there more to it

joshawad · Answer

Xa*Xb=Xa-b

anonymous · Answer

i think answer to it is two

joshawad · Answer

... vI DONT WANT THE STUPID ANWER!!!!

joshawad · Answer

:)

anonymous · Answer

x-a/x-b = b-x/a-x

Start by cross multiplying:

x-a(a-x) = (b-x)(x-b)

Simplify:

-x^2 +2bx -b^2 = -x^2 -a^2 + 2ax

Add x^2 to both sides:

2bx - b^2 = -a^2 + 2ax

Get x's on one side and a,b on the other:

2bx - 2ax = b^2 - a^2

Factor 2x on the left side:

2x(b-a) = b^2 - a^2

Divide by b-a on both sides:

2x = (b^2 - a^2) / (b-a)

Factor the top:

2x = (b-a)*(b+a) / (b-a) (The bottom will cancel with the (b-a) of the top)

2x = b+a

x = (b+a)/2

joshawad · Answer

I don't understand????????????????????????????????????????????????????

joshawad · Answer

*=multiply u know that right?
these are not fractions