Question

factorise:
5x^2-4(x^2+1) ​

Answer 1

Answer:

5x²-4(x²+1)

=5x²-4x²-4

=x²-2²

=(x+2)(x-2)

Answer 2

Answer:

=5x^2-4x^2-4

=x^2-4

=x^2-2^2

=(x-2)(x+2)