Express the given number in standard form: 21700000
21700000 can be written as 2.17×10000000=2.17×107
0.00000000837 is expressed in its standard form as x.37×10y, where x and y are integers. Express the number y×10x in its normal form.
Express the product of 2x2+6x-8 and x+3in standard form.