Question

Prosze o zadanie 1 i 7.

Answer 1

zad 1

a) P=a*3/4b+1/3a*1/4b=3/4ab+1/12ab=9/12ab+1/12ab=10/12ab=5/6ab

O=3/4b+a+b+1/3a+1/4b=1 i 1/3a +2b

 

b) P=ab+ab+(b+a)*(b+a)=2ab+(b^2+2ab+a^2)=2ab+b^2+2ab+a^2

O=a+b+b+b+a+b+b+b+a+b+a+b+b=4a+9b

 

c)P=(x+y)^2-2x^2=

O=4(x+y)-4x

 

d)P=(3+2a)(2a+5)-5*2a-a(3+2a-2-a)

O=3+5+2a+2a+a+a+2+2a+5+(3+2a-2-a)

 

chyba dasz rade obliczyc P i O.

 

zad 2)

a)a+1/2a+3

b)(b+5)(b+5)

c)c+c+10+1/10c^2