Question

1.) -6(5p-9q+4r)
2.) (3a+4) × (5a+2)
3.) (5x-6y) × (5x+4y)
4.) (3x+2) × (2x+3y+4)
5.) (-6m-n) × (6m-2n)

Answer 1

1. -6(5p-9q+4r)
   -30p+54q-24r
2. (3a+4) × (5a+2)
     15a²+6a+20a+8
   =15a²+26a+8
3. (5x-6y) × (5x+4y)
  =25x²+20xy-30xy-24y²
  =25x²-10xy-24y²
4. (3x+2) × (2x+3y+4)
  6x²+9xy+12x+4x+6y+8
  6x²+9xy+16x+6y+8
5. (-6m-n)×(6m-2n)
  -36m²+12mn-6mn+2n²
  -36m²+6mn+2n²