Răspuns :
Răspuns:
1 a) 4a^2-9
b) m^2-4n+4n^2
2 (3x+4)^2=9x^2+24x+16
3. 25a^2+70a+49-4b^2
4. A=(2rad27+rad3) ^2 cm^2
A=(4*27+4*9 +3) cm^2
A=147 CM^2
5. 19-8rad3= (4-rad3)^2
Răspuns:
1 a) 4a^2-9
b) m^2-4n+4n^2
2 (3x+4)^2=9x^2+24x+16
3. 25a^2+70a+49-4b^2
4. A=(2rad27+rad3) ^2 cm^2
A=(4*27+4*9 +3) cm^2
A=147 CM^2
5. 19-8rad3= (4-rad3)^2