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really simple question

whilst working through a C4 paper as part of a question 2(x * 3/x1/2) = 6x1/2

how is this possible please
(edited 11 years ago)
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Avatar for rsp
rsp
OP
12
basically that is not clear but the question is asking you to square x + 3/x^1/2 and i can not get all the factors
thankyou
Original post by rsp
whilst working through a C4 paper as part of a question 2(x * 3/x1/2) = 6x/x1/2

how is this possible please


2×(x×3x12)=2×3xx12=6xx12=(6x)(x−12)=6x1−12=6x122 \times \left(x \times \dfrac{3}{x^{\frac{1}{2}}}\right) = 2 \times \dfrac{3x}{x^{\frac{1}{2}}} = \dfrac{6x}{x^{\frac{1}{2}}} = (6x)(x^{-\frac{1}{2}}) = 6x^{1-\frac{1}{2}} = 6x^{\frac{1}{2}}
(edited 11 years ago)
Original post by Igrisok
If the LHS is 2(x + 3)/(x^0.5), I'm getting x = 3 here. I don't think you have to square anything! Could you link to the question please?


This isn't an equation to solve. The OP's asking how to get from the LHS to the RHS. Oh and it was x×3x \times 3 not x+3x + 3 :smile:
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Avatar for rsp
rsp
OP
12
its okay now sorry its not very clear and i managed to work it out :smile:
Original post by Igrisok
Sorry, got a little confused by the second post... But getting from LHS to RHS is pretty simple, OP! It's just 2 * 3 after all :P


Yeah don't worry so did I, I think the OP was trying to say they had to expand (x+3x12)2\left( x + \dfrac{3}{x^{\frac{1}{2}}} \right)^2 and were stuck on simplifying that part.

The OP has since changed her target to 6x126x^{\frac{1}{2}} - so the indices themselves were the problem, I think.
Reply 6
Avatar for rsp
rsp
OP
12
Original post by hassi94
2×(x×3x12)=2×3xx12=6xx12=(6x)(x−12)=6x1−12=6x122 \times \left(x \times \dfrac{3}{x^{\frac{1}{2}}}\right) = 2 \times \dfrac{3x}{x^{\frac{1}{2}}} = \dfrac{6x}{x^{\frac{1}{2}}} = (6x)(x^{-\frac{1}{2}}) = 6x^{1-\frac{1}{2}} = 6x^{\frac{1}{2}}


thanks that explained it perfect :smile:

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