Question

PILNE !!! Egzamin semestralny

Answer 1

 

 

 

 

Zad 1

1/3·∛-27         1/3·(-3)

 

 ----------- ·9= ----------- ·9= 1/3·(-3)=-1

      3²                9

 Odp B

Zad 2

5²⁵·25⁵⁰=5²⁵·(5²)⁵⁰=5²⁵·5¹⁰⁰=5²⁵⁺¹⁰⁰=5¹²⁵

Odp C

Zad 3

2√12-√27=2√4·3-√9·3=4√3-3√3=√3=3 1/2

Odp A

Zad 4

x=4-3√2

(4-3√2)²=16-24√2+18=-24√2+34

Zad 8

5(x-1)

--------<x/*3

 

   3

5(x-1)<3x

5x-5<3x

5x-5-3x<0

2x-5<0

2x<5/:2

x<2 1/2

Odp C

Zad 9

2(x+2y)²-(2x+y)(2x-y)=2(x²+4xy+4y²)-(4x²-2xy+2xy-y²)=2x²+8xy+8y²-4x²+y²=

=-2x²+8xy+9y²