Question

Factorise 1-x-72x^2
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Answer 1

Answer:

16x² + 72x + 81

( 4x ) ² + 2 × 4x × 9 + ( 9 ) ²

a² + 2ab + b² = ( a + b ) ²

( 4x + 9 )²✔✔✔

Step-by-step explanation:

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