Jika A=[(4 2)(1 0)] dan B=[(1 2)(3 −3)] maka 2A−B adalah …

Halo Mino :) Jawaban: 2A-B = [(7 2) (-1 3)] Perhatikan konsep perhitungan perkalian matriks berikut: X = [(a b)(c d)] 2X = (2)[(a b)(c d)] = [(2a 2b)(2c 2d)] Perhatikan juga konsep pengurangan matriks berikut: = [(a b)(c d)] - [(e f)(g h)] = [(a-e b-f)(c-g d-h)] Jika A=[(4 2)(1 0)] dan B=[(1 2)(3 −3)] Maka 2A−B adalah … = (2)[(4 2)(1 0)] - [(1 2)(3 −3)] = [(2(4) 2(2)) (2(1) 2(0))] - [(1 2)(3 −3)] = [(8 4) (2 0)] - [(1 2)(3 −3)] = [(8-1 4-2) (2-3 0-(-3))] = [(7 2) (-1 3)] Jadi, nilai dari 2A-B adalah...[(7 2) (-1 3)]