16x^2-72xy+81y^2-12x+27y+9/4 Factorise experts kindly answer it fast I have a test tomorrow

16x2 - 72xy + 81y2 - 12x + 27y + 9/4
= 16x2 + 81y2 + 9/4 - 72xy + 27y - 12x
= (-4x)2 + (9y)2 + (3/2)2 + 2*(-4x)*9y + 2*9y*3/2 + 2*(3/2)*(-4x)
= (-4x + 9y + 3/2)2
= (-4x + 9y + 3/2)(-4x + 9y + 3/2)

  • -3
What are you looking for?