Q.30 Solve the following: (i) If x+ y=12 and xy = 27, find the value of x'+ y (ii) If a+b=10 and a² +b² = 58, find the value of a³ +b³ 1 =7, find the value of x³ + 1 (iii) If x² + (iv) If a+b+c=9 and...

Extracted text: Q.30 Solve the following: (i) If x+ y=12 and xy = 27, find the value of x'+ y (ii) If a+b=10 and a² +b² = 58, find the value of a³ +b³ 1 =7, find the value of x³ + 1 (iii) If x² + (iv) If a+b+c=9 and ab+bc+ca=26, then find a² +b² +c² (v) If 3x+2y=12 and xy = 6, find the value of 27x +8y (vi) If x+ y+ z=10 and x + y +z² = 40, find xy+ yz + zx