Question

5x2-29xy-42y2 factorization

Answer 1

((5•(x3))-((29•(x2))•y))-((2•3•7y2)•x)

((5 • (x3)) - (29x2 • y)) - (2•3•7xy2)
(5x3 - 29x2y) - (2•3•7xy2)
5x3 - 29x2y - 42xy2  =   x • (5x2 - 29xy - 42y2) 
Factoring    5x2 - 29xy - 42y2 

Found a factorization  :  (x - 7y)•(5x + 6y)

x • (x - 7y) • (5x + 6y)

I hope this will help you