Question

1.Выполнить действия:
1) 0,7a^2y (-0,8a^5y^10)
2) -0,4a^5 (-5a^3)^4
3) (3x^7y^3)^4 1/81 xy
4) (3y^2 + 3y - 4) - (y^2 - 2y + 7)
5) 2c (c^2 + 3c)
6) (x + 4) (x^2 + 2x - 3)
7) (x + 1) (x^2 + 2x - 3)
8) (15x^2y + 10xy) : (1/5 xy)

Answer 1

1)0,7*(-0.8)*a^2*a^5*y*y^10=-0,56a^7y^11

2)-0.4a^5*625a^12=-0.4*625*a^5*a^12=-250a^17

3)81*x^28*y^12*1/81*x*y=81*1/81x^28*x*y^12*y=x^29y^13

4)3y^2+3y-4-y^2+2y-7=3y^2-y^2+3y+2y-4-7=2y^2+5y-11

5)2c*c^2+2c*3c=2c^3+6c^2

6)x*x^2+x*2x-x*3+4*x^2+4*2x-4*3=x^3+2x^3-3x+4x^2+8x-12=7x^3+5x-12

7)x*x^2+x*2x-x*3+1*x^2+1*2x-1*3=x^3+2x^2-3x+x^2+2x-3=x^3+3x^2-x-3

8)15:1/5x^2:xy:y+10:1/5x:xy:y=75x+50