Question

公式法因式分解,1.1002^2-1002×4+42.80062-1600×798+798^2

Answer 1

1.1002^2-1002×4+4

=1002^2-2×2×1002+2^2

=(1002-2)^2

=1000^2

=1000000

2.800^2-1600×798+798^2

=800^2-2×800×798+798^2

=(800-798)^2

=2^2

=4