Question

$3x2 - 12$
factorise
​

Answer 1

Answer:

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Answer 2

✪ Question ✪

3x²-12 factorise.

✪ To find ✪

The factor of 3x²-12.

✪ Identity to be used ✪

(a²-b²) = (a+b)(a-b)

✪ Solution ✪

3x²-12

= 3(x²-4) {as 3 is common}

= 3(x²-2²) {4 = 2²}

= 3(x+2)(x-2) {x²-2² = (x+2)(x-2)}

✪ Hence ✪

3x²-12 = 3(x+2)(x-2)

✪ Therefore ✪

3x²-12 when factorised gives 3(x+2)(x-2).

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