Math, asked by eudximoniia, 2 months ago

FACTORISE: 9a^2 - b^2 + 4bc - 4c^2

Answers

Answered by shahinaekram2007

0

Step-by-step explanation:

=9a^2 ‐ ( b^2 ‐ 4b +4)

=9a^2 ‐ ((b)^2 ‐ (2×b×2) + (2)^2)

=9a^2 ‐ (b‐2)^2

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