Which shows all the values of x that make the rational expression 2x^2-72/5x^2-245 underlined

7 and -7

Step-by-step explanation:

Correct question

Which shows all the values of x that make the rational expression 2x^2-72/5x^2-245 undefined

For the expression to be undefined, the denominator must be equal to zero

Hence 5x² - 245 =0

Add 245 to both sides

5x²-245+245 = 0+245

5x² = 245

x² = 245/5

x² = 49

x = ±√49

x =7 and -7

Hence the values of x that will make the function undefined are 7 and -7

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)