I need serious help with this. first math problem of the year and I'm lost.
Find all real zeros of the function
y=x^2-7x-30
Given $\displaystyle ax^2 + bx + c = 0$ where $\displaystyle a,b,c \in \Re$, the real roots of the equation are:
$\displaystyle x_{1,2} = \frac{-b \pm \sqrt{b^2 -4ac}}{2a}$
Alternatively, for the case where a=1, you can try factorizing the expression by finding a pair of numbers $\displaystyle A$ and $\displaystyle B$ such that $\displaystyle AB = c$ and $\displaystyle A + B = b$; in this case, $\displaystyle AB = -30$ and $\displaystyle A + B = -7$