Question

Q2 factorise
vi.9x²y²- 16

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Answer 1

$(3xy + 4)(3xy - 4)$

Hope it's helpful to you

Answer 2

$\Huge\underbrace\mathfrak\orange{Answer:}$

⇒ 9x²y² – 16

⇒ (3xy)² – (4)

$\mathfrak\blue{by\:using\:formula}$

$\pink{a²\: – \: b² \: = \: ( a + b ) \: ( a \: – \: b )}$

⇒ (3xy)² – (4)

⇒ ( 3xy + 4 ) ( 3xy – 4 )

$\huge\mathcal\color{lime}I\:hope\:it\:helps\:you.$