Please help me quickly on this question!

The given expression represents the area. Find the side length of the square. Hint: FACTOR!

Please help me quickly on this question The given expression represents the area Find the side length of the square Hint FACTOR class=

Respuesta :

a^2 = A
so
a^2 = 100r^2 - 220 r + 121
a^2 = (10r - 11)^2
a = 10r - 11

answer

the side length of the square = 10r - 11