Our vision is to revolutionize rewarding and gifting in corporate organizations - simplifying and streamlining corporate rewards programs and increasing satisfaction levels for recipients; making it a 'simply rewarding' experience for all.
7. 配方法解方程ax2 bx c 0
a 0
解: a 0
b c
化系数为1得: x x 0
2
a a
移项得:
b c
x 2
x
a a
2 2
b b c b
配方得: x x
2
a 2a a 2a
b 2 4ac
2
b
即: x
2a 4a 2