Question

HELP!! MEDAL!!
Solve the equation by completing the square.
r^2 - 6r - 80 = -8

Answer 1

do u know (a-b)^2 formula

Answer 2

think of completing the square as asking " what is necessary to have a perfect square ?"
you know a square is an entity multiplied by itself
to make a perfect square with a quadratic polynomial first half the coefficient of the x term then square
here the coefficient is -6 half would be -3 therefore you need to make a perfect square from (r-3)^2