Question

1.22²×9-1.33²×4 102²+204×98+98² 用因式分解计算

Answer 1

1.22²×9-1.33²×4
= 3.66 ^2 -2.66^2
=(3.66+2.66)(3.66-2.66)
=6.32
102²+204×98+98²
= (102+98)^2
=40000

Answer 2

1.22^2*9-1.33^2*4
1.22^2*3^2-1.33^2*2^(1.22*3)^2-(1.33*2)^2
3.66^2-2.66^2
(3.66+2.66)(3.66-2.66)=6.32*1=6.32
102^2+204*98+98^2
102^2+2*102*98+98^2
(102+98)^2
200^2
40000