exam Maths Puzzle Numerical Ability

How many imaginary zeros does the function f(x)=3x^4+2x^3+4x+7 have?

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exam Other Question

how do i simplify this?(8 x square root of 3)(3 x square root 10) Fundraising. The St. Mark�s Community Barbecue served 250 dinners. A child�s plate cost $3.50 and an adult�s plate cost $7.00. A total of $1347.50 was collected. How many of each type of plate was served?