10. If 2a3 + 5 = 15, then the value of ‘a’ is
a) –15 b) 15
c)-20 d) None of these
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2 thoughts on “10. If 2a3 + 5 = 15, then the value of ‘a’ is<br />a) –15 b) 15<br />c)-20 d) None of these <br />​”

1. Step-by-step explanation:

   hey 2a3 ??

   3 is power of a or in multiply can’t understand your question

   if the question is this: 2a / 3 +5 = 15

   2a + 15 / 3 = 15

   2a + 15 = 45

   2a = 45 – 15

   2a = 30

   a = 30 / 2

   a = 15 is the answer

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2. Answer:

   3 is a power of a,many people make the mistake of not putting the power sign

   2a^3 + 5 = 15

   2a ^3 = 15 – 5

   2a^3 = 10

   a^3 = 10/2

   a^3 = 5

   a = cube root 5

   Hence the answer is option d: None Of These

   Step-by-step explanation:

   Have a nice day dear 🙂

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