exam Maths Puzzle Numerical Ability

Hello, I need help with this problem and simplyfying my answer as much as possible. Thank you!!

x^2+2x-15
_________
x^2-9
_________
x^2+6x+5
_________
x^2+4x+3

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exam Other Question

Write the equation of the line what has y- intercept (0,5) and its
perpendicular to the line with the equation y=3x+1

Please help me solve this

Thanks
Find an equation of a line passing through (-1,0) and parallel to the line whose equation is given by x-y=1.