Question

Factorise : 8m^2 – 128n^2​

Answer 1

$8 {m}^{2} - 128 {n}^{2} \\ 8 {m}^{2} = 128 {n}^{2} \\ 2 {m}^{2} = 32 {n}^{2}$

${m}^{2} = 16 {n}^{2} \\ m = 4n$

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Answer 2

Step-by-step explanation:

8m²-128n²

8(m²-16n²)

8{(m)²-(4n)²}

8(m+4n)(m-4n). {using (a+b)(a-b)= (a²-b²)}

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