1.Wykonaj mnożenie
a) (x+2)(y+1)=
b) (2a+1)(3-b)=
c)
d) (2x-1)(y-3)=
e) (x-y)(a-b+9)=
2.wykonaj mnożenie i zrdekukuj wyrazy podobne.
a) (x+1)(x+2)=
b) (3a+4)(a-5)=
c) (2t+1)(1-3t)=
d) (3ab-7)(3-7ab)=
e) (-x+y)(5x+6y)=
f) (x+5y)(7x-y)=
g)
h) (ab-a)(2ab+6a)=
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a) xy + x + 2y + 2
b)6a - 2ab + 3 - b
c) ?
d)2xy - 6x -y + 3
e)ax - bx + 9x - ay +by - 9y
2. x² + 2x + x + 2 = x² + 3x +2
3a²-15a +4a - 20 = 3a² - 11a - 20
2t-6t²+1-3t = -t - 6t² +1
reszty zadań nie pamiętam jak zrobić a musze złazić z kompa bo z psem wychodze ;)
1.a) (x+2)(y+1)=xy+1x+2y+2
b)(2a+1)(3-b)=5a-2ab+3-b
d)(2x-1)(y-3)=2xy-5x-1y+3
e)(x-y)(a-b+9)=xa-xb+9x-ya+yb-9y
2.a)(x+1)(x+2)=x^2+2x+x+2=x^2+3x+2
b)(3a+4)(a-5)=3a^2-15a+4a-20=3a^a-11a-20
c)(2y+1)(1-3t)=2y+6yt+1-3t
d)(3ab-7)(3-7ab)=9ab-21ab^2-21+49ab=58ab-21-21ab^2
e)(-x+y)(5x+6y)=-5x^2-6xy+5xy+6y^2=-5x^2-xy+6y^2
f)(x+5y)(7x-y)=7x^2-xy+35xy-5y=7x^2+34xy-5y
h)(ab-a)(2ab+6a)=2ab^2+6a^2b-2a^2b-6a^2=2ab^2+4a^2b-6a^2