Question

Factorise by splitting the middle term: x²+4x-45

Answer 1

x2+4x−45

=x2+9x−5x−45

=x(x+9)−5(x+9)

=(x+9)(x−5)

∴x2+4x−45=(x+9)(x−5).

I hope you understand if any problems

Answer 2

Answer:

x^2 +4x−45

=x^2 +9x−5x−45

=x(x+9)−5(x+9)

=(x+9)(x−5)

∴x^2 +4x−45=(x+9)(x−5).