Question

factorise
$x ^2 - 64 =$

Answer 1

x^2 - 64 = 0
x^2 = 64
x = +8 or x=-8

Hope you understand..
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Answer 2

ⓗⓔⓨ ⓕⓡⓘⓔⓝⓓ

ⓗⓔⓡⓔ ⓘⓢ ⓨⓞⓤⓡ

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$x {}^{2} - 64 \\ \\ (x) {}^{2} - 8 {}^{2}$



Using the identity (a+b)(a-b) = a^2-b^2


so,


$(x + 8)(x - 8)$



Hope it helps you


@ prabhudutt