Question

1. 2x²-xy-y²=
2. 2x²-7x-15=

Answer 1

1) 2x²-xy-y² = 2x²-2xy+xy-y²
                   = 2x(x-y)+y(x-y)
                   = (2x+y)(x-y)
2) 2x²-7x-15 = 2x²-10x+3x-15
                     = 2x(x-5)+3(x-5)
                     = (2x+3)(x-5)
      semoga membantu :)