Question

14 (3y - 5z)^2 - 21 (5z - 3y)^3​..​

Answer 1

Answer:

thnx for points tanvi..

btw we solve it as..

Step-by-step explanation:

(14•(3y-5z))•2)-(21•(5z-3y)•3

((14 • (3y - 5z)) • 2) - 63 • (5z - 3y)

(14 • (3y - 5z) • 2) - 63 • (5z - 3y)

28 • (3y - 5z) - 63 • (5z - 3y)

 5.1      Pull out     3y-5z 

Note that  5z-3y =(-1)• 3y-5z 

After that we are left with :

      (3y-5z) • ( 28  *  (-1) +( 63  *  (-1) ))

Final result :

-91 • (3y - 5z)

(•) means multipycation sign ok?

hope it helpa