Wykonaj działania. a) (2x-y)(3x+2y)-(2x+y)(3x-2y) b) 5x[3(x-7)+6(x+8)]
DAM NAJKE.
porzeczkisialalala
A) (2x-y)(3x+2y)-(2x+y)(3x-2y)= 6x²+4xy-3xy-2y²-(6x²-4xy+3xy-2y²)=6x²+xy-2y²-6x²+xy+2y²=2xy b) 5x[3(x-7)+6(x+8)] =5x(3x-21+6x+48)=15x²-105x+30x²+240x=45x²+135x
b) 5x[3(x-7)+6(x+8)] =5x(3x-21+6x+48)=15x²-105x+30x²+240x=45x²+135x