Question

factorise the following 1)x^2-36

Answer 1

${x}^{2} - 36 \\ = {x}^{2} - {6}^{2} \\ = (x - 6)(x + 6) \: \: \: \: \: \: \: by \: using \: {a}^{2} - {b}^{2} = (a + b)(a - b)$

Answer 2

Hi ,

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By using algebraic identity,

a² - b² = ( a + b ) ( a - b )

We find the factors.

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x² - 36

= x² - 6²

= ( x + 6 ) ( x - 6 )

I hope this helps you.

:)