Question

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)=

Answer 1

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 ;)

Answer 2

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