Question

1.Przeksztalc na sumy nastepujace iloczyny stosujac wzor skroconego mnozenia

b)(2x-1)(2x+1)=

c)(4x+1)(4x-1)=

d)(5y+2z)(5y-2z)=

e)(3x-4y)(4y+3x)=

f)(4a+7b)(7b-4a)=

g)(2\5x+3)(2/5x-3)=

h)(0,3a-2)(2+0.3a)=

i)(2,5a+3)(2,5a-3)=

j)(7,2x+1)(7,2x-1)

2.Doprowadz nastepujace wyraznienia do najprostszej postaci:

a) (x+y)2-(x-y)2=

Answer 1

1)

b)(2x-1)(2x+1)=4x2-1

c)(4x+1)(4x-1)=16x2-1

d)(5y+2z)(5y-2z)=25y2-4z2

e)(3x-4y)(4y+3x)=9x2-16y2

f)(4a+7b)(7b-4a)=49b2-16a2

g)(2\5x+3)(2/5x-3)=4/25x2-9

h)(0,3a-2)(2+0.3a)=0,09a2-4

i)(2,5a+3)(2,5a-3)=6,25a2-9

j)(7,2x+1)(7,2x-1)=51,84x2-1

2

a) (x+y)2-(x-y)2=x2+2xy+y2-x2+2xy-y2=4xy

 

Answer 2

b)=4x2-1

c)16x2-1

d)25y2-4z2

e)9x2-16y2

f)49b2-16a2

g)4/25x2-9

h)0,09a2-4

i)6,25a2-9

j)51,84x2-1

2.

a)=(x2+2xy+v2)-(x2+2xy-y2)=4xy

 

LICZE NA NAJ............