Question

please tell me fast answer​

Answer 1

Answer:

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Answer 2

Answer:

$\huge\orange{ \mid{ \underline{ \overline{ \tt 9x³ +21x²y +27xy²+ 7y³}} \mid}}</p><p>$

Step-by-step explanation:

(x - y)³+ 8 (x + y)³

Evaluate : (x-y)³ = x³-3x²y+3xy²-y³

Evaluate : (x+y)³ = x³+3x²y+3xy²+y³

=( x³-3x²y+3xy²-y³)+8(x³+3x²y+3xy²+y³ )

=( x³-3x²y+3xy²-y³) +(8x³+24x²y+24xy²+8y³ )

=(x³+8x³)+(-3x²y+24x²y)+(3xy²+24xy²)+(-y³+8y³)

9x³+21x²y+27xy²)+7y³

Final result :

9x³ +21x²y +27xy²+ 7y³

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