Question

Expand and simplify each of the following expressions.
(a) 4x(3y - 5z) - 5x(2y - 3z)
(b) x(2x - y) + 3x(y - 3x)

plz help​

Answer 1

Answer:

(a) 2xy-5xz, (b) 2xy -7x²

Step-by-step explanation:

(a) 4x(3y - 5z) - 5x(2y - 3z) = 12xy-20xz-10xy+15xz= 2xy-5xz

(b) x(2x - y) + 3x(y - 3x) = 2x²-xy+3xy-9x²= 2xy -7x²

Answer 2

Answer:

(a) 4x(3y - 5z) - 5x(2y - 3z)

→ 4x(3y) + 4x(- 5z) - 5x(2y) - 5x(- 3z)

→ 12xy - 20xz - 10xy + 15xz

→ 12xy - 10xy - 20xz + 15xz

→ (12 - 10)xy + (- 20 + 15)xz

→ (2)xy + (- 5)xz

→ 2xy - 5xz

(b) x(2x - y) + 3x(y - 3x)

→ x(2x) + x(- y) + 3x(y) + 3x(- 3x)

→ 2x² - xy + 3xy - 9x²

→ 2x² - 9x² - xy + 3xy

→ (2 - 9)x² + (- 1 + 3)xy

→ (- 7)x² + (2)xy

→ - 7x² + 2xy