Question

a) 25 (x +4) (x2 +4x + 3) = 5 (x + 4) (x + 1)​

Answer 1

Answer:

5x³ + 39x² + 90x + 56 = 0

Step-by-step explanation:

25 (x +4) (x2 +4x + 3) = 5 (x + 4) (x + 1)​

(25x + 100)(x² + 4x + 3) = (5x + 20)(x + 1)

25x³ + 100x² + 75x + 100x² + 400x + 300 = 5x² + 5x + 20x + 20

25x³ + 200x² + 475x + 300 = 5x² + 25x + 20

25x³ + 200x² + 475x - 5x² - 25x = 20 - 300

25x³ + 195x² + 450x  = - 280

5(5x³ + 39x² + 90x) = -280

(5x³ + 39x² + 90x) = -280/5

(5x³ + 39x² + 90x) = - 56