( 1)4x？ - 16y？ -4x+ 1

=(4x？ -4x+ 1)- 16y？

=(2x- 1)？ - 16y？

=(2x- 1)？ -(4y)？

=(2x- 1+4y)(2x- 1-4y)

②(x？ -2x)？ -(x？ -2x)-6

=(x？ -2x-3)(x？ -2x+2)

Question (2) should be X? -2x as a whole, if regarded as a, then the original formula is a? -a-6

Then use cross multiplication (if cross multiplication is not taught, there should be pq formula)

Decompose -6 into the product of -3 and 2, decompose.