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Digiron [165]
3 years ago
15

What number would you add to both sides of x2 + 7x = 4 to complete the square?

Mathematics
2 answers:
pashok25 [27]3 years ago
8 0

<u>Answer</u>

12.25


<u>Explanation</u>

x² + 7x = 4

The number that should be added on both sides is the square of half the coefficient of x.

That is (7/2)².

(7/2)² = 7²/2²

         = 49/4

          = 12.25

∴<em> x² + 7x + 3.5² = 4 + 12.25</em>

<em>  (x +  3.5) ² = 16.25</em>


 


galina1969 [7]3 years ago
8 0

Answer:(7/2)2


Step-by-step explanation:the answer is (7/2) to the second power.


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