# Find H.C.F. from 4x^4 + 19x^(2)y^(2) + 49y^4 and 4x^3 + 14xy^2 - 6x^(2)y

I did the 2nd exprn, but I'm stuck in 1st. pls help.

1st expression:

= 4x^4 + 19x^(2)y^(2) + 49y^4

2nd expression:

= 4x^{3} + 14xy^{2} - 6x^{2}y

= 2x(2x^{2} + 7y^{2} - 3xy)

= 2x(2x^{2} - 3xy + 7y^{2})