book Maths Puzzle Numerical Ability

Hello, I would appreciate it if a tutor could please verify my answer for the below problem.


Solve the rational inequality: x^2-7x+10 / x+3 > 0


My answer:


Numerator

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book Other Question
SOME MATHMATICAL APPLICATIONS IN BUSINESS INVOLVE FINDING A BREAK-EVEN POINT. THE BREAK-EVEN POINT REPRESENTS THE NUMBER OF ITEM PRODUCED AND SOLD SUCH THAT THE COST OF PRODUCING how do you prove the quadratic formula of
y=ax^2=bx=c