NEED Help From Basic Ohm's Law to E=SqRt of P*R

Basic Ohm's Law E P ----------------
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I R E I

What simple Ohm's Law formulas get combined to (Exp.E=RxI E=P/I} to arrive at I=SqRt of P/R V=SqRt of P*R P= V^2/R

Thank You for any advice Frustrated Apprentice

Basic Ohm's Law E P ----------------

What simple Ohm's Law formulas get combined to (Exp.E=RxI E=P/I} to arrive at I=SqRt of P/R V=SqRt of P*R P= V^2/R

Thank You for any advice Frustrated Apprentice