Question

factorise 3x^2 -4 .​

Answer 1

Answer:

3x^2 - 4 = root under 3 whole square - whole square of 2 = ( root under 3 + 2) ( root under 3 - 2)

Answer 2

Answer:

Given - 3x^2-4

This expression can be written as -

(√3x)^2 - (2)^2

now using identity a^2-b^2 = (a+b)(a-b)

(√3x)^2 - (2)^2 = (√3x+2)(√3x-2)

hence the factor is (√3x+2)(√3x-2)