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Maths Help Needed :(

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Tohru Kyo Sohma:

--- Quote from: astarmathsandphysics on August 23, 2012, 06:43:03 pm ---18x^2-32=2(9x^2-16)=2(3x-4)(3x+4)

--- End quote ---
so it's D?

Tohru Kyo Sohma:

--- Quote from: astarmathsandphysics on August 23, 2012, 06:44:58 pm ---(2a-b)/b=2a/3-b/b=2a/b-1=3
2a/b=4 so a/b=2 so b/a=1/2=0.5

--- End quote ---
so c is right?

Tohru Kyo Sohma:
Solve 2x^2+6x-3=0
options:
a. x=(-3+- root of 15)/2
b. x=(-3+- root of 3)/2
c. x=(3+- root of 15)/2
d. x=-3+-root of 15
e. none of the above

I think its E?
Is it right?

astarmathsandphysics:
D then C for the first 2.

astarmathsandphysics:
D then C for the first 2.
For the third I make it A using the quadratic formula.

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