Question

wykonaj mnożenie

(n+2)*(n+3)=

(7+y)*(10-y)=

(ab-1)*(c+1)=

(3-8x)*(3+8x)=

(xy+3y)*(4xy-5y)=

Answer 1

(n+2)*(n+3)= n²+3n+2n+6=n²+5n+6

(7+y)*(10-y)=70-7y+10y-y²=-y²+3y+70

(ab-1)*(c+1)= abc+abc-c-1=2abc-c-1

(3-8x)*(3+8x)=9-64x²

(xy+3y)*(4xy-5y)= 4xy²-5xy²+12xy²-15y²=11xy²-15y²

Answer 2

1)n²+3n+2n+6

2)70-7y+10y-y²

3)abc+ab-c-1

4)9+24x-24x-64x²

5)4x²y²-5xy²+3xy²-15y²