Question

why he called the people​

Answer 1

Explanation:

To solve the equation, factor x2−4x−5 using formula x2+(a+b)x+ab=(x+a)(x+b). To find a and b, set up a system to be solved.

a+b=−4ab=−5

Since ab is negative, a and b have the opposite signs. Since a+b is negative, the negative number has greater absolute value than the positive. The only such pair is the system solution.

a=−5b=1

Rewrite factored expression (x+a)(x+b) using the obtained values.

(x−5)(x+1)

To find equation solutions, solve x−5=0 and x+1=0.

x=5x=−1