What is the sum of all prime numbers p and q , which satisfy the equation : -LSB- math -RSB- p ^ 2 - p + 1 = q ^ 3 -LSB- / math -RSB- ?
What is the angle between vectors -LRB- P+Q -RRB- and -LRB- P-Q -RRB- given that the magnitude of the resultant vector -LRB- P+Q -RRB- is sq. root -LRB- 3P ^ 2 - Q ^ 2 -RRB- ?