Thực hiện phép tính a) (x+5)^2-x(x+10) b) (18x^6y^6-12x^5y^5+24x^3y^5): 6x^3y^5
Giải thích
a. (x+5)2−x(x+10)
=x2+10x+25−x2−10x
=(x2−x2)+(10x−10x)+25
=25
b) (18x6y6−12x5y5+24x3y5):6x3y5
=18x6y6:6x3y5−12x5y5:6x3y5+24x3y5:6x3y5
=3x3y−2x2+4
a. (x+5)2−x(x+10)
=x2+10x+25−x2−10x
=(x2−x2)+(10x−10x)+25
=25
b) (18x6y6−12x5y5+24x3y5):6x3y5
=18x6y6:6x3y5−12x5y5:6x3y5+24x3y5:6x3y5
=3x3y−2x2+4