Question

x square-4x-21=? *



(x-7) (x-3)

( x+7) (x-3)

( x -7) (x+3)

None of these

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Answer 1

Answer:

x square -4x-21=x square -7x+3x-21=x(x-7)3(x-3) =(x+3) (x-7) answer

3. (x-7) (x+3) ans.