exam Maths Puzzle Numerical Ability

binomial squared to multiply:
(6x+5)exponent2
my work: (6x+5)(6x+5)=
36xexponent2 + 30x + 30x + 25=
36xexponent2 + 60xexponent2 + 25=
96xexponent4 + 25

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exam Other Question

Use unit multipliers to convert 7 cubic yards per second to cubic feet per minute. S(x) = x^-2 is an example of:
a. An inverse function
b. A rational expression
c. A composite function
d. A polynomial