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  • Użytkownik Zadane
2010-03-08T16:15:41+01:00
6xy-5xy+4xy-3xy+2xy-xy= 3xy

3x-2y+3,5x-y+2+₅¹⁰ y= 6,5x -2,5y

₁⁶ t²+₁³k²t+₁³tk²-k²t+₁²t²-₁⁶tk²= 4/6 t² - 3/6tk² = 2/3t² - 1/2 tk²

-(-a)+(-b)= a - b

a-(-)(-b)= a- b

a-(b-a)= a-b +a = 2a -b

(a+b)x³+(a+b)x= (a + b)(x³+x) = ax³ +bx³ +ax + bx

4(a+b)(4a-2)-(2a-2b)²= (4a+4b)(4a - 2) - ( 4a² - 8ab + 4b²) = 16a² -8a +16ab -8b- 4a² +8ab - 4b² = 12a² +24ab -8a -8b -4b²

(3k+ 7l - 2)(2l - 2k)=(3k - 14)(2l - 2k) = 6kl - 6k² - 28l + 28k
2010-03-08T16:38:23+01:00
6xy-5xy+4xy-3xy+2xy-xy= 3xy

3x-2y+3,5x-y+2+₅¹⁰ y=5,5x-3y+₅¹⁰ y

-(-a)+(-b)=a-b

a-(-)(-b)=a-b

a-(b-a)=a-b+a= 2a-b

(a+b)x³+(a+b)x=x³a+x³b+a+b

4(a+b)(4a-2)-(2a-2b)²=4(4a²-2a+4ab-2b)-(4a²-8ab+4b²)=16a²-8a+16ab-8b-4a²+8ab-4b²=12a²-8a+24ab-8b

(3k+ 7l - 2)(2l - 2k)= 6kl-6k²+14l²-14kl-4l+4k= -8kl-6k²+14l²-4l+4k
2010-03-08T17:06:08+01:00
6xy-5xy+4xy-3xy+2xy-xy=3xy

3x-2y+3,5x-y+2+₅¹⁰ y=6,5x-2,5y

₁⁶ t²+₁³k²t+₁³tk²-k²t+₁²t²-₁⁶tk²= ? (co oznaczają te znaki ?)

-(-a)+(-b)=a-b

a-(-)(-b)=a-b

a-(b-a)=a-b+a=2a-b

(a+b)x³+(a+b)x=ax³+bx³+ax+bx

4(a+b)(4a-2)-(2a-2b)²=a(4a²-2a+4ab-2b)-(4a²-8ab+4b²)=
=4a³-2a²+4a²b-2ab-4a²+8ab-4b²=4a³-6a²+4a²b+6ab-4b²

(3k+ 7l - 2)(2l - 2k)= 6kl-6k²+14l²-14kl-4l+4k=-6k²+14l²-8kl-4l+4k