book Maths Puzzle Numerical Ability

Page 210 Problem 44.g(10)
Question; Let g(x)= -x squared + 4x+1.

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book Other Question

If the L in the xy-plane has one-third the slope and five times the y-intercept of the line 5x-3y, then the equation for L is?



Please help me solve this question I never did
(x^2+x-20) (x^2+10+25)
_________ divide __________
(x^2-7x+12) ( x^2-6x+9)