Question

25x2 - 90xy + 81y by using appropriate identities​

Answer 1

Answer:

Step-by-step explanation:

25 = 5^2

81=9^2

ok?

now, back to the question

25x2 - 90xy + 81y

= (5x)^2 + (9y)^2 - 2*45 xy

now, 45 = 5 * 9, right?

= (5x)^2 + (9y)^2 - 2*5*9 xy

by a^2 + b^2 -2ab = (a-b)^2

=> (5x - 9y)^2

hope it helped,

please mark as brainliest if it did

Answer 2

25x2 - 90xy + 81y by using appropriate identities.