First slide

Theory of equations

Question

The number of real solutions of $x^{2} + 5 | x | +$ 4=0 is

Moderate

A

0
B

1
C

2
D

4

Solution

If $x \in R$ then $x^{2} + 5 | x | + 4 \geq 4$
Thus, the given equation has no solution.

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