Factorize each of the following quadratic polynomials by using the method of completing;
4x2 – 12x + 5
We have,
4x2 – 12x + 5 = 4 (x2 – 3x + 
)
= 4 [x2 – 3x + (
)2 – (
)2 + 
)] [Therefore, adding and subtracting (
)2]
= 4 [(x - 
)2 – 12] (Therefore, completing the square)
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