Question

Hasil dari ( 3b - 2 )** - ( b - 3 )** adalah?
** =pangkat 2 ya

Answer 1

(3b-2)^2 = (3b-2)(3b-2) = 9b^2-6b-6b+4 = 9b^2-12b+4
(b-3)^2 = (b-3)(b-3) = b^2-3b-3b+9 = b^2-6b+9
9b^2-12b+4 -b^2-6b+9 = 8b^2-6b-5

Answer 2

(3b - 2)² =(3b - 2) (3b - 2)
= 9b² - 6b - 6b + 4
= 9b² - 12b + 4
(b - 3)² = (b - 3) (b - 3)
= b² - 3b - 3b + 9
= b² - 6b + 9
=(9b² - 12b + 4) - (b² - 6b + 9)
= 9b² - 12b + 4 - b²+ 6b - 9
= 9b² - b² - 12b +6b + 4 - 9
= 8b² - 6b - 5