Question

0,8*(-7)^4-0,3*(-7)^2+45

Answer 1

(-7)²(0,8*(-7)²-0,3)+45= 49*(0,8*49-0,3)+45= 49*(39,2-0,3)+45=49*38,9+45=1906,1+45= 1951,1

Answer 2

To calculate the expression 0.8 * (-7)^4 - 0.3 * (-7)^2 + 45, you need to follow the order of operations (PEMDAS/BODMAS):

1. First, calculate the powers:

   • (-7)^4 = 2401
   • (-7)^2 = 49

2. Next, multiply and subtract:

   • 0.8 * 2401 = 1920.8
   • 0.3 * 49 = 14.7

3. Finally, subtract and add:

   • 1920.8 - 14.7 + 45 = 1951.1

So, the result of the expression is 1951.1.