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# Maths Help

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1. I was wondering if someone could help me with these maths questions
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2. (Original post by chloecrazy)
I was wondering if someone ciyld help me with these maths questions
1st one easy difference of two squares (you could just multiply all the LHS side but that's unnecessary)

Next, express 6.4 as a fraction and express 10^-3 as a fraction, multiply them in the normal way then reduce down to simplest form

Next, just the standard rule for independent probabilities, probability(A and B) = probability(A) * probability(B)

Next, note that you can express 8^4 as a power of 2, and doubling a power of 2 increases the power by 1

Next, assuming you are meant to make x the subject, you can can multiply both sides by x, get all the x terms on one side and factorise out

Next, simplify to express them in the form a*root(c) and the order will be obvious

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Updated: August 11, 2016
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