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प्रश्न
Factorised form of 4y2 – 12y + 9 is ______.
रिकाम्या जागा भरा
उत्तर
Factorised form of 4y2 – 12y + 9 is (2y – 3)(2y – 3).
Explanation:
Let 4y2 – 12y + 9 = (2y)2 – 2 × 2y × 3 + 32
= (2y – 3)2 ...[∵ (a – b)2 = a2 – 2ab + b2]
= (2y – 3)(2y – 3)
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