5x^4-3x^2
land(without forest)covers 2/7 of earth's surface.1/3 of this land is in asia. what fraction of the earth's surface is land (witho...
3+-3
tanA.secA=2^(1/2)
1. It has been suggested that abnormal male children tend to occur more often in children born to older
than average mothers. ...
|4x-4|=16
3dn+4nd+7dn = 14dn
|4x+2|=12
\((-b\pm \sqrt{b^{2}-4ac})/(2a)\)
a=6-3
