exam Maths Puzzle Numerical Ability

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Find the value of the polynomial 2x^2-2x-4 when x=2

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exam Other Question

if x is any interger, then 1.x=x.so when you see x in a p0roblem you can change it to 1x. you can also change a to 1a,a2 to 1a2,xy to 1xy,etc. so what,s 8a+a= after graphing the boundary line for the linear inequality. Determine the correct half plane in this case and complete the graph
y>3