Question

Alguem pode me ajudar com essas contas // Fatore as expressoes A) 5x-15y // B )x2-64 // C) 3x-3y+bx+by // D) x2-8x+16 // E) 25a2-9

Answer 1

5x - 15y = 5(x - 3y)

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x² - 64 = (x + 8)(x-8)

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3x - 3y + bx - by =          OU    3x + 3y + bx + by =
3(x - y) + b(x - y)=                    3(x + y) + b(x + y) =
(x - y)((3 + b)                            (x + y)(3 + b)

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x² - 8x + 16 = (x - 4)²

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25a² - 9 = (5a + 3)(5a - 3)

Answer 2

A) 5x - 15y = 5 ( x - 3y )
B) x² - 64 = ( x + 8 ) ( x - 8 )
C) 3x - 3y + bx + by = 3 ( x - y ) + b ( x - y ) = ( 3 + b ) ( x - y )
D) x² - 8x + 16 = ( x - 4 )²
E) 25a² - 9 = ( 5a + 3 ) ( 5a - 3 )

Bons estudos ;)