exam Maths Puzzle Numerical Ability

help me name this property if 4m=-15,then-12m-45

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exam Other Question

2x+y<3
x-y>-6
y>0 Find the quotient and remainder of f(x)=x^4-2 divided by p(x)=x-1. after working it out I came up with x^3+x^2+x+1; -1. not sure if thats right. thanks for any help given.