2 תשובות
(a(49-x^2
..2
=..49a-ax
....2
=(...a(49-x
....2....2
=(...a(7...-x
(a(7-x)(7+x
=..49a-ax
....2
=(...a(49-x
....2....2
=(...a(7...-x
(a(7-x)(7+x
אנונימי
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