Question

1) Factarise. 9z²-6Z+1​

Answer 1

༒࿐៚ Answer ༒࿐៚

$9 {z}^{2} - 6z + 1 \\ \\ {3}^{2} {z}^{2} - 2 \times 3z \times 1 + {1}^{2} \\ \\ (3z {)}^{2} - 2 \times 3z \times 1 + {1}^{2} \\ \\ (3z - 1 {)}^{2}$

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Answer 2

Answer:

9z^2-6z+1

9z^2-3z-3z+1

3z (3z-1)-1 (3z-1)

(3z-1)(3z-1)=0

z=1/3

Step-by-step explanation:

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