Question

factorise
x²-4
9a²-16b²​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

${x}^{2} - 4 \\ = {(x)}^{2} - {(2)}^{2} \\ = (x - 2)(x + 2) \\ \\ 9 {a}^{2} - 16 {b}^{2} \\ = {(3a)}^{2} - {(4b)}^{2} \\ = (3a - 4b)(3a + 4b)$

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