Question

Write the expression for the volume of the cube whose side is given by the expression 3x + 5.
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Answer 1

Answer:

27x³+135x²+225x+125

Step-by-step explanation:

given

side is 3x+5

so

volume of cube is (side)³

so volume is

(3x+5)³=27x³ +135x²+225x+125

Answer 2

I Will tell how he get the answer

(3x+5)³=(a+b)³

(3x+5)³=(a+b)³according to this (a+b)³=a³+3a²b+3ab²+b³

so if we put the number,,, this become

3x³+3*(3x)²*5+3*3x*5²+5³

NOW MAIN THING.

• 3x³+3*(3x)²*5+3*3x*5²+5³
• 27x³ + 3*9x²*5 + 9x*25+125
• 27x³+135x²+225x + 125

HOPE THIS IS HELPFUL