(7 - 2x) × (2x - 7)=???
bantuin ka
pake rumus yg kayak bulan gitu bisa ga?![]()
bantuin ka
pake rumus yg kayak bulan gitu bisa ga?
Begini tanggapan lesti:
(7 - 2x) × (2x - 7)
[tex] \\ \\ [/tex]
Begini jawaban lesti:
= 7(2x - 7) - 2x(2x - 7)
= 7 × 2x - 7 × 7 - 2x (2x - 7)
= 7 × 2x - 7 × 7 - 2x × 2x - 2x × (-7)
= 7 × 2x - 7 × 7 - 2x × 2x + 2x × 7
= 14x - 7 × 7 - 2x × 2x + 2x × 7
= 14x - 7 × 7 - 4x² + 2x × 7
= 14x - 7 × 7 - 4x² + 14x
= (14x + 14x) - 49 - 4x²
= (14 + 14)x - 49 - 4x²
= 28x - 49 - 4x²
[tex](7-2x) \times (2x-7) \\ 14x-49-4x^{2}+14x \\ 28x-49-4x^{2} [/tex]
[answer.2.content]
