FISA DE LUCRU 1 ° Efectuati: a x+32; b 2t+12; c 5+3a2; d 2x+5y2; 2' Efectuati: a x-a2 b -x+y2; c 3x2-y2; d 2x-5y32; 3* Efectuafi: a 2- square root of 32 b - square root of 5+32 ; c square root of 7- square root of 32 4' Efectuati: a x+ax-a b x+3x-3 c t+77-t; 5°* Efectuati: a x+12-2x; b 4x+2-x2;

(1) x^{2} + 6 x + 9(2) 4 t^{2} + 4 t + 1(3) 9 a^{2} + 30 a + 25(4) 4 x^{2} + 20 x y + 25 y^{2}(5) x^{2} - 2 x a + a^{2}(6) x^{2} - 2 x y + y^{2}(7) 9 x^{4} - 6 x^{2} y + y^{2}(8) 4 x^{2} - 20 x y^{3} + 25 y^{6}