Question

(5x²-y²)(x²+3y²)+(2x²+y²)(x²-3y²)

please answer fast ​

Answer 1

Answer:

(5x²-y²)(x²+3y²)+(2x²+y²)(x²-3y²)

=(5x² - y²)(x² + 3y²) + (2x² + y²)(x² − 3y²)

=5(x² + 3y²) • x² + (x² + 3y²) (−y²) + (2x² + y²)(x² − 3y²)

=5(x² + 3y²) • x² + (x² + 3y²) (−y²) + (2x² + y²)(x² − 3y²)

=5x⁴ + 15x²y² + (x² + 3y²) (−y²) + (2x² + y²)(x² − 3y²)

=5x⁴ + 15x²y² + (x² + 3y²) (−y²) + (2x² + y²)(x² − 3y²)

=5x⁴ + 15x²y² − (x² + 3y²) · y² + (2x² + y²)(x² − 3y²)

=5x⁴+ + 15x²y² − (x² + 3y²) · y² + (2x² + y²)(x² − 3y²)

=5x⁴ + 15x²y² − (x²y² + 3y4) + (2x² + y²)(x² − 3y²)

=5x⁴+ 15x²y² − (x²y² + 3y⁴) + (2x² + y²)(x² − 3y²)

=5x⁴ − + 15x²y² − 1x²y² − 3y⁴ + (2x² + y²)(x² − 3y²)

=5x⁴ + 15x²y²-x²y² − 3y⁴ + (2x² + y²)(x² – 3y²)

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Answer 2

Answer:

correct answer is

7x⁴-6y⁴+9x²y².