Question

please help meeeeeeeeeeeeeeee​

Answer 1

(ii)(3y + 5x - 7) (x - 1) - (y - 2x + 3) (x + 4)

. 3xy - 3y + 5x² - 5x - 7x + 7 - (xy + 4y - 2x² - 8x + 3x + 12)

. 3xy - 3y + 5x² - 5x - 7x + 7 - xy - 4y + 2x² + 8x - 3x - 12

. 7x² + 2xy - 7x - 7y - 5

(iii)a² + (3a - b) (3a + b + b²)

. a² + 9a + 3ab + 3ab² - 3ab - b² - b³

. a² + 9a + 3ab² - b² - b³

(iv)x²y(x - y²) + xy²(4xy - 2x²) - x³y(1 - 2y)

. x³y - x²y³ + 4x²y³ - 2x³y² - x³y - 2x³y²

. 3x²y³ - 4x³y²