(5x - 3y)*(5x + 3y) + (3x - 5y)*(3x + 5y)=

Question

(5x - 3y)*(5x + 3y) + (3x - 5y)*(3x + 5y)=

Comments

=15x^2-9y^2+9x^2-25y^2=24x^2-34y^2

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Плизз

Answer 1

(25х²-9у²)+(9х²-25у²)=25х²-9у²+9х²-25у²=34х²-34у²=34(х²-у²)