1969 AHSME Problems/Problem 19

Problem

The number of distinct ordered pairs $(x,y)$ where $x$ and $y$ have positive integral values satisfying the equation $x^4y^4-10x^2y^2+9=0$ is:

$\text{(A) } 0\quad \text{(B) } 3\quad \text{(C) } 4\quad \text{(D) } 12\quad \text{(E) } \infty$

$\fbox{B}$

1969 AHSC (Problems • Answer Key • Resources)
Preceded by Problem 18	Followed by Problem 20
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