Tìm max, min:
(4x^2+9)/x^2+1

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

5x10^11 x 65

325 x 10^11

or

325,