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VladimirAG [237]
4 years ago
8

Please help 50 points! ​

Mathematics
2 answers:
kkurt [141]4 years ago
7 0

d=10

Answer:

Solution given:

\sqrt{25+3x}=d+2x

squaring both side

25+3x=(d+2x)²

when x=-3

25+3*-3=(d+2*-3)²

25-9=(d-6)²

16=(d-6)²

\sqrt{16}=d-6

4=d-6

d=4-6

d=10

Naddik [55]4 years ago
5 0

Answer:

The answer is d= -2

Step-by-step explanation:

\sf{}

=> √25+√3x= d+2x

=> 25+3x= (d+2x)²{squaring both sides}

=> 25+3x(-3)=(d+2x-3)²

=> 25-9= (d-6)²

=> 16= (d-6)²

=> √16=d-6

=> 4= d-6

=> d= 4-6

=> d= -2

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