Question

15. If x + y +z = 10 and x2 + y2 + z2 = 40 find xy + yz + zx and x2 + y2 + z3 - 3xyz
16. Factorize 8x3 - (2x - y)3
Pls help me guys​

Answer 1

Please write the questions carefully.......I not understand this question