Science, asked by jayantodey31, 9 months ago

13. Factorise:-x square
-4X - 21

Answers

Answered by sumanpatelvaanshi

3

Answer:

x=7

x=-3

Explanation:

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Answered by AMAZINGLYJMG15

0

Answer:

x²- 4x-21

= x²-7x+3x-21

= x= +7

= x= -3

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