Question #99e62

1 Answer
Nov 15, 2016

Answer:

#100r^2 + 20r + 1 = (10r + 1)(10r + 1)#

Explanation:

You factor this by looking for combination of integers which when added equal 20 and when multiplied equal 100. Additionally, these integers can be the coefficients of the #r# variable. A good combination is 10 and 10 giving:

#100r^2 + 20r + 1 = (10r + 1)(10r + 1)#