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प्रश्न
In the case find whether the trinomial is a perfect square or not:
a2 - 10a + 25
योग
उत्तर
a2 - 10a + 25
= (a)2 - 2 × a × 5 + (5)2
= (a - 5)2 [∵ a2 - 2ab + b2 = (a - b)2]
∴ The given trinomial a2 - 10a + 25 is a perfect square.
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Factorising a Perfect Square Trinomial
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