Question 724328
u= -5i+9j, v=5i-j, w=-5i


5u-(2v-w) 


5(-5i+9j)-(2(5i-j)-(-5i)) 


5(-5i+9j)-(10i-2j+5i) 


-25i+45j-10i+2j-5i


-40i+47j


Answer: -40i+47j