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# Could someone please explain this maths question? (AS, C1) Watch

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1. Given that y=2x, express 22x and 22+x in terms of y.

I got 22x = y2, but I don't know what to do for the second one
2. Anyone...?
3. indice rules
4. Well 22+x is the same as 22 × 2x which is equal to 4 × y = 4y.
5. Yeah agreed with asinghj, look at that rule and you will get it
6. (Original post by pfate)
Well 22+x is the same as 22 × 2x which is equal to 4 × y = 4y.
Thank you for providing the steps! :^_^:

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Updated: October 3, 2016
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