36a2 - 60a + 25
= 36a2 - 30a - 30a + 25
= 6a(6a - 5) - 5(6a - 5)
= (6a - 5)(6a - 5)
= (6a - 5)2
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x2 + 10y + 25 doesn't factor neatly. If that was x2 + 10x + 25, it would factor to (x + 5)(x + 5) or (X + 5)2
(4x + 5)(4x + 5)
Factor the polynomial x2 - 10x + 25. Enter each factor as a polynomial in descending order.
(x - 4)(x - 25)
(x - 5)(x - 5)