Question

-x²-4x+21 factorise it​

Answer 1

Answer:

$(x + 7)( - x + 3)$

Step-by-step explanation:

$- {x}^{2} - 4x + 21 \\ - {x}^{2} - 7x + 3x + 21 \\ - x(x + 7) + 3(x + 7) \\ (x + 7) ( - x + 3)$

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Answer 2

here is your answer mate hope it helps....