Ummmmmm... how about I don't care never have and never will
Here, we are having a quadratic equation in one variable because the highest degree is 2 and contains only one variable i.e. x
Given, equation:

Now, if we observe the terms used in the polynomial, 81x² and 100 separated by a negative sign, we can analyze and can factorise using the identity:

Consider:
So, let's factorise by using the above identity


Here, a = 9x and b = 10,

Is the factorised form of 81x² - 100
So Correct Option is: Option C
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Answer:
x = 6 (A)
Explanation:
We plug y = x^2 - 5x + 3 into 5x + y = 39 and we have
5x + x^2 - 5x + 3 = 39
-> x^2 = 36
-> x = 6
Someone who could unify or at least help
heal the country