exam Maths Puzzle Numerical Ability

My last tough problem of the night is done but I would feel much better knowing I AM DOING THEM RIGHT SO I am checking 2 of them on this site (which is AWESOME!)

-50+(-2)(3(1-F)-3(-2+F)) simplify..thanks!

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exam Other Question

Could someone please help me to solve
3x^2-11x=4


Thanks in advance for your help!
Based on your observation list out 4 points on the characteristics of logarithmic or exponential functions and their graphical representation