exam Maths Puzzle Numerical Ability

((x+7)^2/25)+((y-3)^2/16)=1

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exam Other Question

Find the domain of f, the roots of f(x)=0, and determine the signs of f where


f(x)= x^2-1/sqrt x+1 + sqrt x+1
Need help with question #14. I need to solve for the roots of each quadratic equation using the factoring method, but I need to place the equation in standrard form before factoring. Thanks so much in advance for time and help. =)
x^2+3x-40= 0