Question

Qual o polinômio que representa a diferença (x - 4y)² - (x + 5y)² ? PRECISO PRA HOJEEEWW​

Answer 1

Resposta:

$- 18xy - {9y}^{2}$

Explicação passo-a-passo:

$(x - 4y)^{2} - (x + 5y)^{2} \\ {x}^{2} - 8xy + 16 {y}^{2} - ( {x}^{2} + 10xy + 25 {y}^{2} ) \\ {x}^{2} - 8xy + 16 {y}^{2} - {x}^{2} - 10xy - {25y}^{2} \\ - 18xy + {16y}^{2} - {25y}^{2} \\ - 18xy - { 9y}^{2}$

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