Question

in this equation , the one root is= 3 , now answer the a=?
now answer the other 2 roots​

Answer 1

Answer:

Step-by-step explanation:

x² - 7x + a = 0

Since 3 is a root

(3)² - 7(3) + k =0

9 - 21 + k = 0

k = 12

So equation is

x² - 7x + 12 = 0

x² -3x -4x + 12 = 0

x(x-3)-4(x-3) = 0

(x-4)(x-3) = 0

x = 4 or 3