Question

-3n square + 51n-156 = 0
middle term spliting
solve fast ,
tomorrow is my exam
urgent,

Answer 1

Heya !!!

This is your answer.

Given equation :-
-3n^2 + 51n - 156 = 0.

We will do two steps to make it simple and easy to solve :-
First ....
Multiply the whole equation by (-), we get
3n^2 - 51n + 156 = 0.
Now take out 3, as it is common in all.
n^2 - 17n + 52 = 0

Now we have to find two numbers a and b such that a+b = -17 and ab = 52.

By looking at the prime factors of 52..
52 = 2 X 2 X 13.
We get a and b as -4 and -13.

Therefore......
n^2 - 17n + 52 = 0.
n^2 - 13n - 4n + 52 = 0
n (n-13) - 4 (n-13) = 0.
(n-4)(n-13) = 0.
n - 4 = 0 or n - 13 = 0
n = 4 or n = 13.

Hence the two zeroes are 4 and 13.

Hope it helps

Answer 2

Answer:

your answer is n=4 or n=13

hope it helps you

thank you