1. Factorise the quadratic numerator.
2x2−5xy−12y2=(2x+3y)(x−4y)
2. Factorise the denominator using difference of two squares.
x2−16y2=x2−(4y)2=(x−4y)(x+4y)
3. Cancel the common factor and write the simplified fraction.
x2−16y22x2−5xy−12y2=(x−4y)(x+4y)(2x+3y)(x−4y)=x+4y2x+3y
答案x+4y2x+3y