book Maths Puzzle Numerical Ability

how do you prove the quadratic formula of
y=ax^2=bx=c

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book Other Question

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
please help me solve this equation
3x^2-7=2(x^2+3)