Question

Factorize: x² + 4y² − 9z² − 4xy​

Answer 1

Answer:

it cannot be factorised further

Answer 2

Step-by-step explanation:

x² + 4y - 4xy - z

[(x²) + (2y) - 2 × x × 2y] - z² [a² + b² - 2ab = (a - b)²]

(x - 2y)² - z² [a² - b² = (a - b)(a + b)]

(x - 2y + z)(x - 2y - z).

Solve done.

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