Question

How to solve 7=2(r+1)^2-3

Answer 1

Add 3 to both side:

10 = 2(r+1)^2

Divide both sides of the equation by 2:

5 = (r+1)^2

Take the square root of both sides:

√5 = r+1

Subtract 1 from both sides :

√5 - 1 = r

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