problem: combining like terms exercise 3
Combine the like terms to make a simpler expression:
a) 6x² – 5x³ – 7x =
b) 8y² – 2y³ – y + 3y² – 7y =
c) – 2y³ + y² – 2y³ – 3y – 4y² =
answers: combining like terms exercise 3
a) 6x² – 5x³ – 7x = – 5x³ + 6x² – 7x
in detail:
Unlike terms can’t be added together to make one term!
b) 8y² – 2y³ – y + 3y² – 7y = – 2y³ + 11y² – 8y
in detail:
– 2y³ = – 2y³
+ 8y² + 3y² = + 11y²
– y – 7y = – 8y
c) – 2y³ + y² – 2y³ – 3y – 4y² = – 4y³ – 3y² – 3y
in detail:
– 2y³ – 2y³ = – 4y³
+ y² – 4y² = – 3y²
– 3y = – 3y