(3x-2)*(3x+2)-9x^2+3x-49 при х=50

Question

(3x-2)*(3x+2)-9x^2+3x-49 при х=50

Answer 1

(3x-2)*(3x+2)-9x^2+3x-49 = 9х^2 - 4 - 9х^2 + 3х -49 = 3х - 53

 

3х - 53 = 3 *50 - 53 = 97