Упростите выражение 1) (3а^2-6a)(0.5^4-2)-5a^2(0.3a^4-1)+a^2-12; 2) (x^3-y^2)*(2x^4-y ^3)-(2x^…
Упростите выражение
1) (3а^2-6a)(0.5^4-2)-5a^2(0.3a^4-1)+a^2-12;
2) (x^3-y^2)*(2x^4-y ^3)-(2x^2-y^3)(x^5-y^4)
3) (0.5b^3-0.2c^4)(4b^5+6c^2)+(3c^5-b^6)*(0.4c+2b^2)
4)3a^2(b-2c^2+5)-5(3a^2b-4)+6c(a^2c+2)-(4b^3+12c)
1) (3а^2-6a)(0.5^4-2)-5a^2(0.3a^4-1)+a^2-12;
2) (x^3-y^2)*(2x^4-y ^3)-(2x^2-y^3)(x^5-y^4)
3) (0.5b^3-0.2c^4)(4b^5+6c^2)+(3c^5-b^6)*(0.4c+2b^2)
4)3a^2(b-2c^2+5)-5(3a^2b-4)+6c(a^2c+2)-(4b^3+12c)
1 Ответ (-а, -ов)
1) A= (3a² -6a)(0.0625 -2) — 1,5a^6 +5a² +a² — 12 =
= -1,9375·(3a² -6a)- 1,5a^6 +6a² — 12 = 1,1875 + 11,625a — 1,5a^6 -12
2) B=2x^7 -x³y³ — 2^4y²+y^5 — 2x^7 +2x²y^4 +x^5y³ — y^7=
= -x³y³ — 2x^4y²+y^5 +2x²y^4 +x^5y³ — y^7
3) C= 2b^8 +3b³c² -0,8b^5c^4 -1,2c^6 +1,2c^6+6b²c^5 -0,4b^6c — 2b^8 =
= 3b³c² -0,8b^5c^4+6b²c^5 -0,4b^6c
4) D = 3a²b -6a²c²+15a² -15a²b+20+6a²c²+12c -4b³ -12c=
= 15a² -12a²b -4b³ +20
= -1,9375·(3a² -6a)- 1,5a^6 +6a² — 12 = 1,1875 + 11,625a — 1,5a^6 -12
2) B=2x^7 -x³y³ — 2^4y²+y^5 — 2x^7 +2x²y^4 +x^5y³ — y^7=
= -x³y³ — 2x^4y²+y^5 +2x²y^4 +x^5y³ — y^7
3) C= 2b^8 +3b³c² -0,8b^5c^4 -1,2c^6 +1,2c^6+6b²c^5 -0,4b^6c — 2b^8 =
= 3b³c² -0,8b^5c^4+6b²c^5 -0,4b^6c
4) D = 3a²b -6a²c²+15a² -15a²b+20+6a²c²+12c -4b³ -12c=
= 15a² -12a²b -4b³ +20