I'd like the answer, but steps are better. I need to show work
Number 13: 3√5 (3-5√10)
Step 1: Distribute 3√5 into the parenthesis
So it would be
3√5(3) +
3√5(-5√10)
Step 2: Multiply 3√5 by 3 to get 9√5
Now it's
9√5 + 3√5(-5√10)
Step 3: Multiply 3√5 by -5√10
Now it's 9√5 -
15√5√10Step 4: Multiply √5 by √10 to get √(5)(10)
Now it's 9√5-15
√(5)(10)Multiply 5 by 10 to get 50
Now it's 9√5 - 15
√50Then do perfect square root stuff and you'll get
9√5+(-75√2)