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3f - 22n is an expression, not a formula. An expression cannot be reformulated to change its subject.
well, first you use the formula and then you do A=formula problem sloved A=n*(n) A=the answer= to n times n
The formula can be written, with "n" representing a number or value, as n2 or n X n.
n(1-R)L is an expression: it is not a formula.
n*(n+1)
There is no formula that will sum n even numbers without further qualifications: for example, n even numbers in a sequence.