Question

4. Решите уравнение: (3x+4)^2 -(3x-1)(3x+1)=41

Answer 1

(3х + 4)² - (3х - 1)(3х + 1) = 41

(3х)² + 2*3х*4 + 4² - ((3х)² - 1²) = 41

9х² + 24х + 16 - 9х² + 1 = 41

24х = 41 - 17

24х = 24

х = 24 ÷ 24

х = 1