*एका पेटीची किंमत (a - 7) रु.असून (a + 7) पेट्यांची एकूण किंमत किती?*
1️⃣ (a² - 14a + 49)रु.
2️⃣ (a² - 49)रु.
3️⃣ (a² + 14a + 49)रु.
4️⃣ (a² + 49)रु.
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