Question

Bentuk faktor dari 162 a⁴- 32b⁴ adalah....
A. 2(9a²-4b²)(3a²+2b²)(3a-2b)
B. 2(9a²+4b²)(3a²+2b²)(3a-2b)
C. 2(9a²+4b²)(3a+2b)(3a-2b)
D. 2(9a²-4b²)(3a+2b)(3a-2b)

Answer 1

Pakai selisih kuadrat
a^2 - b^2 = (a +b) (a - b)

162a^4 - 32b^4
2 (81.a^4 - 16b^4)
2 . (9 a^2 + 4 b^2)(9a^2 - 4b^2)
2(9a^2 + 4b^2)(3a + 2b)(3a - 2b)
jawaban C