How do you find the zeroes for #f(x) = x^2 – 9x – 70#?
We need to think of two numbers, that, when I add them, sum up to
Through some thought, we arrive at
Thus, our equation is as follows:
To find the zeroes, we take the opposite signs to get
Hope this helps!
-5 and 14
To solve f(x), find 2 numbers (real roots) knowing the sum (-b = 9) and the product (c = - 70). They are: - 5 and 14.
Note . This method avoids proceeding the lengthy factoring by grouping and solving the 2 binomials.