Factor k^2-10k+21

Math
k2-10k+21
Consider the form x2+bx+c. Find a pair of integers whose product is c and whose sum is b. In this case, whose product is 21 and whose sum is -10.
-7,-3
Write the factored form using these integers.
(k-7)(k-3)
Factor k^2-10k+21

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