Question

factorise:
9-30z+25z^2 ...its urgent
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Answer 1

Answer:

(5z - 3)(5z - 3)

Step-by-step explanation:

$25 {z}^{2} - 30z + 9 \\ = {(5z)}^{2} - 2 \times 5z \times 3 + {3}^{2} \\ = {(5z - 3)}^{2} \\ = (5z - 3)(5z - 3)$

hope you get your answer

Answer 2

Answer:

9 - 30z +25z^2

= 9 - 15z - 15z + 25z^2

= 3 × ( 3 - 5z) - 5z × ( 3 - 5z)

= (3 - 5z) (3 - 5z)

or

( 3 - 5z)^2