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Verified answer
Materi : Selisih KuadratRumus dasar :
a² - b² = (a + b)(a - b)
Pembahasan :
(3x + y)² - (x - y)²
= (3x + y + x - y)(3x + y - x + y)
= (4x)(2x + 2y)
= 8x² + 8xy