Sagot :
(2x+y)²=49 her iki tarafın karekökünü alırsak;
2x+y= 7 veya -7 olur
Negatif değeri -7 dir.
-7 oluyo eminim cünkü cevap 7 cıkıyo neegatif degeri ise -7b oluyo
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