1.

9x2 – y2 = ……………… A) (3x + y) (3x – y) B) (3x – 1) (3x – y) C) (3x – y)(3x – 3)D) None

Answer»
Question:
9x² – y²

Answer:
A) (3x + y) (3x – y)

Solution:
We know the algebraic identity:
a² – b² = (a + b) (a – b)

Apply the same identity.
  • 9x² = (3x)²
  • y² = (y)²
So, the answer would be
(3x + y) (3x – y)


Hope it helps you :)
Please select my answer as best.

A) (3x + y) (3x – y)



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