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# C1 - Indices Question watch

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1. Just got a C1 question I couldn't do....

Please show all working step by step Thanks
2. Take (x+7)^0.5 as a common factor.
3. Got it, Thanks!
4. (Original post by shift3)
Take (x+7)^0.5 as a common factor.
if i do that then i get (x+7)^0.5 (3 - 2/3(x+7)^3)

where do i go from there?
5. You mean (x+7) not (x+7)^3!

remember that x^(3/2) = x^(1 + 1/2) = x times x^(1/2)

Davros
6. (Original post by davros)
You mean (x+7) not (x+7)^3!

remember that x^(3/2) = x^(1 + 1/2) = x times x^(1/2)

Davros
so you get

(x+7)^0.5 (3-2/3(x+7)) ?
how do u simplify that?
7. There doesn't seem to be a lot you can do except writing

3 - 2/3(x+7) = (1/3)(9 - 2x -14) = -(1/3)(2x+5)

Davros

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