Question

(-a+3b-c)² expand using identities​

Answer 1

Answer:

= (-a)² + (3b)² - (c)²

= -a² + 9b - c²

Answer 2

Some Identities:-

• (a + b)² = a²+ 2ab + b²

• (a - b)² = a² - 2ab +b²

• (a² - b²) = (a + b) (a - b)

• (a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca.

Solution:-

( - a + 3b - c ) ²

[•°• (a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca.]

a² - 6ab + 2ac + 9b² - 6bc

_________________________________________

< hope its helpful for you >