exam Maths Puzzle Numerical Ability

Find the zeros of the polynomial function and state the multiplicity of each. Graph the polynomial function. Factor first if the expression is not in factored form.
f(x)=3x squared (x-2)(x+1)

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Please help me solve this problem thank you in advance

sol:-since x=2/3 therefore substitute value of x in eq 1 e.g. 3(2/3)+6y=0then 2+6y=0 then 6y=-2 ory=-1/3 Jonathan has $7.00 in nickels, dimes, and quarters. He has twice as many dimes as nickels, and 3 times as many quarters as nickels. He has 42 coins altogether. How many of each coin does he have?