hasil Dari a.(-2k+m)² b.(-2x+3y-4)² c.(x-2y+3)² d.(3x-2y-8)² plis tolong bantu dengan caranya tolong ya..... siapa yg jago matematika tolongg plis ... aku doain

a. (-2k+m)(-2k+m)
= 4k²-2km-2km+m²
= 4k²-4km+m²

b. (-2x+3y-4)(-2x+3y-4)
= 4x²-6xy+8x-6xy+9y²-12y+8x-12y+16
= 4x²- 12xy+16x+9y²-24y²+16

c. (x-2y+3)(x-2y+3)
= x²-2xy+3x-2xy+4y²-6y+3x-6y+9
= x²-4xy+6x+4y²-12y²+ 9

d(3x-2y-8)(3x-2y-8)
= 3x²-6xy-24x-6xy+4y²+16y-24x+16y+16
= 3x²-12xy-28x+4y²+32y+16


(coba di cek ulang takut salah hehehe)