Question

Tentukan hasil pengkuadratan dari....

Answer 1

3)
= (3x - y + 4z)²
= (3x - y + 4z)(3x - y + 4z)
= (3x.3x) + (3x.(-y)) + (3x.4z) + (-y.3x) + (-y.(-y)) + (-y.4z) + (4z.3x) + (4z.(-y)) + (4z.4z)
= 9x² - 3xy + 12xz - 3xy + y² - 4yz + 12xz - 4yz + 16z²
= 9x² + 16z² + y² - 3xy - 3xy - 4yz - 4yz + 12xz + 12xz
= 9x² + 16z² + y² - 6xy - 8yz + 24xz

4)
= (5a - 4b - 3c)²
= (5a - 4b - 3c)(5a - 4b - 3c)
= (5a.5a)+(5a.(-4b))+(5a.(-3c))+(-4b.5a)+(-4b.(-4b))+(-4b.(-3c))+(-3c.5a)+(-3c(-4b))+(-3c.(-3c))
= 25a² - 20ab -15ac - 20ab + 16b² + 12bc - 15ac + 12cb + 9c²
= 25a² + 16b² + 9c² - 20ab - 20ab - 15ac  - 15ac + 12bc + 12cb
= 25a² + 16b² + 9c² - 40ab - 30ac + 24cb