Question

factorise y²-155
plz answer within 2 mins
I will mark u as brainliest​

Answer 1

Answer:

Factoring y^2

Step-by-step explanation:

Theory:A difgerence of 2 perfect squares,

A^2-B^2 can be faxtored into (A+B).(A-B)

Proof:(A+B).(A-B)=A^2-AB+BA-B^2=

A^2-AB+AB-B^2=

A^2-B^2=

Note:AB=BA is the commutative property of multiplication

Note:-AB+ABequals zero and is therefore eliminated from the equation.

Check:155 is not a square

Ruling:Binomial can not be factorad as the difference of 2 perfect squares