solve A=P sqrd(1+R) for r

Question

need to find r

 

i know its r= a²-p²/p²     but i dont know the steps

Answer 1

A = P√(1 + R)

 

Square both sides.

 

A² = P²(1 + R)

 

Divide both sides by P².

 

A²/P² = 1 + R

 

Subtract 1 from both sides.

 

A²/P² - 1 = R

 

R = A²/P² - 1 = A²/P² - P²/P² = (A² - P²)/P²

 

R = (A² - P²)/P²

 

The expression you gave needs a parentheses around the numerator.