Question

- Factorise 121y² - m²​

Answer 1

`\boxed{ \bold{ { \boxed{ \sf{(11y + m)(11y - m)}}}}}`

Explanation:

`\sf{121 {y}^(2) - {m}^(2) }`

`\longrightarrow{ \sf{ {(11y)}^(2) - {(m)}^(2) }}`

Use the formula of a² - b² = ( a + b ) ( a - b )

`\longrightarrow{ \sf{(11y + m)(11y - m)}}`

Hope I helped!

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