I will try my best to assist you with your problem.
We need to factor the equation, so you must start by note that leading coefficient is 1 so factor would looks like (R + ?)(R + ?) = 0 because 1*1 = 1
And we know that 1*8 = 8 and 1 + 8 = 9 so then we have (R + 8)(R + 1)=0
Now we can split factors into two equations: either R+8 = 0 R+1 = 0.
Solve both equation and we get R = -8 or R = -1
Hope I helped!
Good Luck!
⛈
Read more on Brainly.com - brainly.com/question/1400054#readmore
1 millimeter = 10000 decameter
225 millimeter = 10000 * 225 = 2250000 decameter