If a-3 b-5- then the value of a3-27 b3-45 a b is-

The correct option is C a + 3b = 5 Cubing both sides, we get (a + 3b)3 = 53 a3 + 27b3 + 3 nbsp; a nbsp; 3b (a + 3b) = 125 a3 + 27b3 + 45ab = 125 (as a + 3 ...

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Byju's Answer

Standard IX

Mathematics

Identity (x+y)(x-y)

If a+3 b=5, t...

Question

If a + 3b = 5, then the value of a³ + 27b³ + 45ab is.

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Solution

The correct option is C

a + 3b = 5

Cubing both sides, we get

(a + 3b)³ = 5³

a³ + 27b³ + 3 a 3b (a + 3b) = 125

a³ + 27b³ + 45ab = 125 (as a + 3b = 5)

Suggest Corrections

If a + 3b = 5, then the value of a3 + 27b3 + 45ab is.

The correct option is C a + 3b = 5 Cubing both sides, we get (a + 3b)3 = 53 a3 + 27b3 + 3 a 3b (a + 3b) = 125 a3 + 27b3 + 45ab = 125 (as a + 3b = 5)

If a + 3b = 5, then the value of a³ + 27b³ + 45ab is.

The correct option is C

a + 3b = 5

Cubing both sides, we get

(a + 3b)³ = 5³

a³ + 27b³ + 3 a 3b (a + 3b) = 125

a³ + 27b³ + 45ab = 125 (as a + 3b = 5)