Question

Evaluate the algebraic expression x^2 - 20 for x = 7 and for x = 9

Answer 1

29

61

Explanation:

x^2 - 20

x = 7 and 9

Evaluate

___________

We know the values of x, let's substitute them with the x in the problem :

(7)^2 - 20

49 - 20

29

(9)^2 - 20

81 - 20

61