Proszę o rozwiązanie tych zadań . Bd bardzo wdzięczna . Daje dużo pkt ;p zad w załączniku .
zad. 1
a)S = 5(k-m)T = k - 7*m = k - 7mb)
S + T:5(k-m) + k - 7m = 5k - 5m + k - 7m = 6k -12m3S + 2T:3*5(k-m) + 2(k-7m) = 15(k-m) + 2k - 14m = 15k - 15m + 2k - 14m = 17k - 29m3T - S:3(k-7m) - [5(k-m)] = 3k - 21m - [5k-5m] = 3k - 21m - 5k + 5m = -2k + 16m
zad. 2
a)
K= x * (-4) * y² * x⁵ * (-2) = 8x^6y^2
L= y * x³ * (-½) * x³ * 4=-2x^6y
M=8y * x⁴* (0,5) * y * x * x=4x^6y^2
b)
podobne k i m 8x^6y^2+4x^6y^2=12x^6y^2
zad. 3
(6xy - 2x² + 4y) + (-2x² - 3y + 5xy) =11xy-4x²+y
(7km² + 4km + k) - (5k - 2km + 8km²) =-km²+6km-4k
c)
4(7x^2y - 2xy^2 + x³ - y²) =28x^2y-8xy^2+4x^3-4y^2
d)
5pr^2(2r - 3p +6pr) =10pr^3-15p^2r^2+30p^2r^3
e)
5x(3x^2 - 2y + y^2) + 3y(4x-y+2y^2) =15x^3+6y^2-3y^2+5xy^2+2xy
zad. 4
18k^2 + 12km + 30m^2) =6(3k^2+2km+5m^2)
72a^4c^6 + 32a^2c^3 - 24a^3c^2 =8a^2c^2(9a^2c^4+4c-3a)
zad. 5
3x[12x^2 - 5(x+1) + 6x(7-2x)] - 11x^2=36x^3-15x^2-15x+126x^2-36x^3-11x^2=100x^2-15x
wartość wyrażenia dla x=0,4
100*0,4^2-15*0,4=16-6=10
zad. 6
(a+b-c)(a-b+c)+(b+a-c)(b-a+c)+(c+a-b)(c-a+b)= a(-a+b+c)+b(a-b+c)+c(a+b-c)(a+b-c)(a-b+c)+(b+a-c)(b-a+c)-c(a+b-c)=a(-a+b+c)+b(a-b+c)-(c+a-b)(c-a+b)(a+b-c)(a-b+c+b-a+c-c)=a(-a+b+c)+b(a-b+c)-(c+a-b)(c-a+b)(a+b-c)c-b(a-b+c)=(b+c-a)(a-c-a+b)c(a+b-c)-b(a-b+c)=(b+c-a)(b-c)c(a+b-c)-b(a-b+c)-(b+c-a)(b-c)=0ac-bc-c²-ab+b²-bc-(b²-bc+bc-c²-ab+ac)=0ac-c²-ab+b²-b²+c²+ab-ac=00=0
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zad. 1
a)
S = 5(k-m)
T = k - 7*m = k - 7m
b)
S + T:
5(k-m) + k - 7m = 5k - 5m + k - 7m = 6k -12m
3S + 2T:
3*5(k-m) + 2(k-7m) = 15(k-m) + 2k - 14m = 15k - 15m + 2k - 14m = 17k - 29m
3T - S:
3(k-7m) - [5(k-m)] = 3k - 21m - [5k-5m] = 3k - 21m - 5k + 5m = -2k + 16m
zad. 2
a)
K= x * (-4) * y² * x⁵ * (-2) = 8x^6y^2
L= y * x³ * (-½) * x³ * 4=-2x^6y
M=8y * x⁴* (0,5) * y * x * x=4x^6y^2
b)
podobne k i m 8x^6y^2+4x^6y^2=12x^6y^2
zad. 3
a)
(6xy - 2x² + 4y) + (-2x² - 3y + 5xy) =11xy-4x²+y
b)
(7km² + 4km + k) - (5k - 2km + 8km²) =-km²+6km-4k
c)
4(7x^2y - 2xy^2 + x³ - y²) =28x^2y-8xy^2+4x^3-4y^2
d)
5pr^2(2r - 3p +6pr) =10pr^3-15p^2r^2+30p^2r^3
e)
5x(3x^2 - 2y + y^2) + 3y(4x-y+2y^2) =15x^3+6y^2-3y^2+5xy^2+2xy
zad. 4
a)
18k^2 + 12km + 30m^2) =6(3k^2+2km+5m^2)
b)
72a^4c^6 + 32a^2c^3 - 24a^3c^2 =8a^2c^2(9a^2c^4+4c-3a)
zad. 5
3x[12x^2 - 5(x+1) + 6x(7-2x)] - 11x^2=36x^3-15x^2-15x+126x^2-36x^3-11x^2=100x^2-15x
wartość wyrażenia dla x=0,4
100*0,4^2-15*0,4=16-6=10
zad. 6
(a+b-c)(a-b+c)+(b+a-c)(b-a+c)+(c+a-b)(c-a+b)= a(-a+b+c)+b(a-b+c)+c(a+b-c)
(a+b-c)(a-b+c)+(b+a-c)(b-a+c)-c(a+b-c)=a(-a+b+c)+b(a-b+c)-(c+a-b)(c-a+b)
(a+b-c)(a-b+c+b-a+c-c)=a(-a+b+c)+b(a-b+c)-(c+a-b)(c-a+b)
(a+b-c)c-b(a-b+c)=(b+c-a)(a-c-a+b)
c(a+b-c)-b(a-b+c)=(b+c-a)(b-c)
c(a+b-c)-b(a-b+c)-(b+c-a)(b-c)=0
ac-bc-c²-ab+b²-bc-(b²-bc+bc-c²-ab+ac)=0
ac-c²-ab+b²-b²+c²+ab-ac=0
0=0