Question

Factorise: 49y2 – 1​

Answer 1

$\huge \fbox{\underline \purple{Answer-}}$

$49 {y}^{2} - 1$

$7(7y) {}^{2} - (1) {}^{2}$

$7(7y + 1)(7y - 1)$

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Further Explaination :-

In 2nd Step,

We use a formulae,

${a }^{2} - b {}^{2} = (a - b)(a + b)$

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$hope \: it \: helps$

Answer 2

Answer:

7(7y²-1)

hope this helps.!!