x2+14x+45
=x2+9x+5x+45 [ Using middle term splitting method ]
=(x2+9x)+(5x+45)
=x(x+9)+5(x+9)
=(x+9)(x+5)
Factorise the quadratic polynomial by splitting the middle term:
x2 + 14x + 45
Factorise: 7x2+2√14x+2