Question

Q(+50)
[tex] \: [/tex]
Jabarkan:

(2x - 9)² = ...​

Answer 1

Jawaban:

4x² - 36x + 81

Penjelasan dengan langkah-langkah:

(2x - 9)²

= (2x)² + (2x . (-9) . 2) + (-9)²

= 4x² + (-36x) + 81

= 4x² - 36x + 81

Answer 2

Jawab:
4x² - 36x + 81

Penjelasan:
a = C²₁₋₁ (2x)²⁻¹⁺¹ (-9)¹⁻¹
a = (2!/(0!(2-0)!) (2x)² (-9)⁰
a = 1 (2x)²
a = 4x²
-----------------------------------
U₂ = C²₂₋₁ (2x)²⁻²⁺¹ (-9)²⁻¹
U₂ = (2!/(1!(2-1)!) (2x)¹ (-9)¹
U₂ = 2(2x)(-9)
U₂ = 4x(-9)
U₂ = -36x
-----------------------------------
U₃ = C²₃₋₁ (2x)²⁻³⁺¹ (-9)³⁻¹
U₃ = (2!/(2!(2-2)!) (2x)⁰ (-9)²
U₃ = (-9)²
U₃ = 81
--------------------
a + U₂ + U₃ =
4x² - 36x + 81

(xcvi)