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Maths Help Needed :(

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astarmathsandphysics:
The 2 disappeared because I cancelled every term by 2

astarmathsandphysics:
0.85+8*0.19=2.37

astarmathsandphysics:
I drew a Venn diagram see attachment.

Tohru Kyo Sohma:

--- Quote from: astarmathsandphysics on August 26, 2012, 02:32:12 pm ---I drew a Venn diagram see attachment.

--- End quote ---

--- Quote from: astarmathsandphysics on August 26, 2012, 02:27:46 pm ---0.85+8*0.19=2.37

--- End quote ---
Thanks


--- Quote from: astarmathsandphysics on August 26, 2012, 02:26:30 pm ---The 2 disappeared because I cancelled every term by 2

--- End quote ---
can we cancel the same terms from numerator together?

Tohru Kyo Sohma:
(3A-4B)^2=
a. 3a^2-4b^2
b. 9a^2-16b^2
c. 9a^2+24ab-16b^2
d. 9a^2+24ab+16b^2
e. none of the above

I think its E
i got my answer as 9A^2-24AB+16B^2

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