Question

if R-r=4 then R²-r²?​

Answer 1

Answer:

R - r = 4

( R - r) ( R + r) = 4 ( R + r)

=> R² - r² = 4R + 4r

Hope helps you...

Answer 2

Answer:

R - r = 4

( R - r) ( R + r) = 4 ( R + r)

=> R² - r² = 4R + 4r