ElectricPavlov

4*2+x2=16

8 + x² = 16

x² = 8

x = ± √8

(7 7/9 ) * .40   =   70/9 * .40 =    $28/9

                         position   1   2     3    4      5    6    7

  possible choices            4 * 3  *  3 *  2  *  2 *  1  * 1  = 144 possibles

There are 128 oz in a gallon....

128 oz/gal  *  2.5 gal  /  8 oz/glass =       128*2.5 / 8          glasses per week

f(x) = x^2-7x+15       

Very cool!  Everything is so lush and green..... we are still in white ( snow)- and -brown ( when snow melts off for a day or two)- season....

   rains will start in just a few weeks ( mixed in with some snows)....but things will start coming back to life ..... time to change the lawnmower's oil !

OK....watch carefully :  

(a+b)³   = 2³

a³ + b³     + 3 a²b   + 3 ab²   = 8

a³  + b³     + 3ab ( a + b)    = 8              now, you are given values for  ab  and  (a+b)  <======sub those in and solve for a³ +b³

You'll just have to use the division symbol....

3/4    is the same as  3 ÷ 4        Look at the dark area above the entry display to see it displayed as 3/4

x^2 + ax + 25 - 9

x^2 + ax + 16                     'a' can be   8 or  -8