exam Maths Puzzle Numerical Ability

Find all intercepts for the graph of the quadratic function. f(x)=5x^2-38x+21

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exam Other Question

The price of a new car increased by 2/3 over the last 5 years. If the original price of the car was $6,000, what is the new price today? Given the standard form for a conic section.

{{{{ax^2+by^2+cxy+dx+ey+f=0 and the values a=-5 b=0 c=0 d=16 e= -4 f= -12}}}}
Rewrite the equation in standard quadratic form.