zad. 1 wykonaj mnożenie
a) (a2+b) (x-y) =
b) (a-b) (x2+y2)
c) (-a2+b) (x2-y)
d) (n4+2) (m2+3)
e) (n3-4) (m3-6)
f)(-2n2+1) (3m4-2)
g) (x2+3) (a-2b+c)
h)(y-3) (2a-b2+4c)
i) 9a3+b-2c) ( x2-y)
zad2 wykonaj mnozenie i zredukuj czyli podkresl wyrazy podobne
c) 2(a+3) (3a-2)
d)(3a2-b) (a2-2b)
e)(-a3+2b) (2a3-b)
f) -4(a-2b) (2b-a)
g)(2x2-3y2) (2x2+3y2)
h) (-x3+4y3) (3x3-2y)
i) -3(x-2y2) ( y-x2)
prosze pomoc z gory dziekuje . daje naj ! ;)
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1.
a) (a2+b)(x-y)= 2ax+2ay+bx-by
b) (a-b)(x2+y2)=2ax+2ay-2bx-2by
c) (-a2+b)(x2-y)=-4ax+2ay_2by-by
d) (n4+2)(m2+3)=8mn+12n+4m+6
e) (n3-4)(m3-6)=9mn-18n-12m+24
f) (-2n2+1)(3m4-2)=-48mn+8n+12m-2
g) (x2+3)(a-2b+c)=2ax*4bx+2cx+3a-6b+3c
h) (y-3)(2a-b2+4c)=2ay-2by+4cy-6a+6b-12c
i) (9a3+b-2c)( x2-y)=54ax-27ay+2bx-by-4cx+2cy
2.
c)
2(a+3)(3a-2)=
2(3a^2-2a+9a-6)=
6a^2-4a+18a-12=
6a^2+14a-12
d)
(3a2-b)(a2-2b)=
12a^2+12ab-2ab+2b^2=
12a^2+10ab+2b^2
e)
(-a3+2b)(2a3-b)=
-18a^2+3ab+12ab-2b^2=
-18a^2+15ab-2b^2
f)
-4(a-2b)(2b-a)=
-4(2ab-a^2-4b^2+2ab)=
-8ab+4a^2-8ab=
-16ab+4a^2
g)
(2x2-3y2)(2x2+3y2)=
16x^2+24xy-24xy-36y^2=
16x^2-36^2
h)
(-x3+4y3)(3x3-2y)=
-27x^2+6xy+108xy-24y^2=
-27x^2+114xy-24y^2
i)
-3(x-2y2)( y-x2)=
-3(xy-2x^2-4y^2+8xy)=
-3xy+6x^2+12y^2-24xy=
-27xy+6a^2+12y^2