Mathematics: Which equation equals 8. 5/2x+7/2=3/4x+14. 5/4x-9=3/2x-12. 5/4x-2=3/2x-4. 5/2x-7=3/4x+14

Which equation equals 8. 5/2x+7/2=3/4x+14. 5/4x-9=3/2x-12.

Ответ:

James300102

03.04.2021

Mathematics

the third one: 5/4x-2=3/2x-4

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Ответ:

anrs14

03.05.2021

Mathematics

The given expression is:

$x^{2} +6x=-7 \\ \\ 
 x^{2} +2(x)(3)=-7$

Adding the square of 3 to both sides, to make the left hand side of the equation a complete square, we get:

$x^{2} +2(x)(3)+ 3^{2}=-7+ 3^{2} \\ \\ 
(x+3)^{2}=2 \\ \\ 
x+3=+- \sqrt{2} 
$

So the values of x are:

a) $x= \sqrt{2} - 3 = -1.59$

b) $x= -\sqrt{2} - 3 = -4.41$

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Which equation equals 8. 5/2x+7/2=3/4x+14. 5/4x-9=3/2x-12. 5/4x-2=3/2x-4. 5/2x-7=3/4x+14

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Which equation equals 8. 5/2x+7/2=3/4x+14. 5/4x-9=3/2x-12. 5/4x-2=3/2x-4. 5/2x-7=3/4x+14​

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Which equation equals 8. 5/2x+7/2=3/4x+14. 5/4x-9=3/2x-12. 5/4x-2=3/2x-4. 5/2x-7=3/4x+14