5m Zen
Z p q
Z p q pictures 5
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Z p
Z p q
solution of p q z
z q ir 1 p
z p 2x q 2x by charpit method
pu0026amp;q sp z oo
solve a p q )u003d z
z p 2 q 2
z p 2x q 2y by charpit method
x y z p q r
p x y z p q
z p q
