Question

(-10gh+20g-30h)*(-0,1gh)=

2,4(-4xy+)=

(7mk - 3m +4k)-(-5k +4m - mk)=

Answer 1

(-10gh+20g-30h)*(-0,1gh)= g²h² - 2g²h + 3gh²

 

2x²(3y² - 4xy + 10x² ) = 6x²y² - 8x³y + 20x^4

 

(7mk - 3m +4k)-(-5k +4m - mk)= 7mk - 3m + 4k + 5k - 4m + mk = 8mk - 7m + 9k

Answer 2

(-0,1gh)·(-10gh+20g-30h)=g²h²-2g²h+3gh²

2x²(3y²-4xy+10x²)=20x⁴-8x³y+6x²y²

(7mk-3m+4k)-(-5k+4m-mk)=7mk-3m+4k+5k-4m+mk=8mk+9k-7m