Given that one root of the equation x2-ax-3a = 0 is 3, then the value of a is and the other root of the equation is

Given that one root of the equation x2-ax-3a = 0 is 3, then the value of a is and the other root of the equation is

x=3
Then 9-3a-3a = 0
a=3/2
x1=3
x1+x2=a=3/2
So x2 = - 3 / 2

Given that one root of equation X2 - (2a-9) x-3a + 3 = 0 is - 3, find another root and a

Speaking
X = - 3
9+3（2a-9）-3a+3=0
9+6a-27-3a+3=0
3a=15
a=5
Weida theorem
x1x2=-3a+3=-12
x2=4

The greening project of a school is contracted by the two engineering teams a and B. the time ratio for the two teams to complete the project alone is 3:2. The team leader can complete the project in 6 days. How many days does it take for the two teams to complete the project alone

The greening project of a school is contracted by the two engineering teams a and B. the time ratio for the two teams to complete the project alone is 3:2. The team leader can complete the project in 6 days. How many days does it take for the two teams to complete the project alone
It will take 3x and 2x days respectively for Party A and Party B to complete the project
(1/3x+1/2x）×6=1
x=5
Team a and team B need 15 and 10 days respectively to complete the project