exam Maths Puzzle Numerical Ability

The number of real roots of the equation 2x4 + 5x2 + 3 = 0 is

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Please help me solve this problem. [[[[2h-6 2]]]]]]
[[[[---- -]]]]]] Victor borrowed $10,500. To repay the loan, he was scheduled to make 48 monthly installment payments of $243.23 each. Instead of making his payment, he decides to pay off the loan.