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प्रश्न
The factors of x2 – 6x + 9 are
विकल्प
(x – 3)(x – 3)
(x – 3)(x + 3)
(x + 3)(x + 3)
(x – 6)(x + 9)
उत्तर
(x – 3)(x – 3)
Explanation;
Hint: x2 – 6x + 9 = x2 – 2(x)(3) + 32
a2 – 2ab + b2 = (a – b)2 = (x – 3)2
= (x – 3)(x – 3)
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