The trinomial x2 + bx – c has factors of (x + m)(x – n), where m, n, and b are positive. What is the relationship between the values of m and n? Explain.
Sample Response: The value of m must be greater than the value of n. When you multiply the binomials, the middle term is the result of combining the outside and inside products. So, bx = –nx + mx, or bx = (–n + m)x. This means that b = –n + m. When adding numbers with opposite signs, you subtract their absolute values, and keep the sign of the number having the larger absolute value. Since b is positive, m must have the larger absolute value
Answer:
b=m-n
c=-mn
Given :
\(x^2+bx-c\)
the factor (x+m)(x-m)
Step-by-step explanation:
For factors (x+m) and (x-m) , the roots can be found by making factors =0 and solve for x
\(x+m=0\\x=-m\\\\x-n=0\\x=n\)
Quadratic equation of the form
\(ax^2+bx+c=0\\The sum of roots = \frac{-b}{a} \\\)
the roots are -m and n
sum of roots
\(-m+n=\frac{-b}{1} \\b=m-n\)
The product of roots = c/a
\(-m(n)=\frac{c}{1} \\c=-mn\)
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