Question

zad 20

Wykonaj dzialania

a (x-3)(x+3)

b (4+a(4-a)

c (y+½)(y-½)

d (⅔-b)(⅔+b)

e (x-√2)(x+√2)

f (√3+m)(√-m)

ZADANIE 25

a (4-√7)(4+√7)

b (√11-√13)(√11+√13)

c (1+3√2)(1-3√2)

d (2√5-2)(2√5+2)

e (2√2-3√3)(2√2+3√3)

f)(3√5+5√3)(3√5-5√3)

Answer 1

zad. 20

a) x2+3x-3x-9=x2-9

b) 16-4a+4a -a2=16-a2

c) y2-1/2y+1/2y-1/4=y2-1/4

d)4/25+2/5b-2/5b-b2=4/25-b2

e)x2-4

f)3-m2

 

zad. 25

a)16-7=9

b)11-13=-2

c)1-9x4=1-36=-35

d)4x5-4=20-4=16

e)4x2-9x3=8-27=-19

f) 9x5-25x3=45-75=-30

Answer 2

 

Zad. 20

a) (x-3)(x+3) = x^2 - 3x + 3x - 9= x^2 - 9

b) (4+a)(4-a) =  16 - 4a + 4a - a^2 = 16 - a^2

c) (y + 1/2)(y-1/2) = y^2 -1/2y + 1/2y - 1/4 = y^2 - 1/4

d) (2/3-b)(2/3+b) = 4/9 + 2/3b - 2/3b - b^2 = 4/9 + b^2

e) =

f)

 

Zad. 25

a)

b)

c)

d)

e)

f)