Question

Jawablah soal di atas!​

Answer 1

Jawab:
(i)   Jika   x = 5   y = -3
(1.) 4(x-2y)-(2x-9y) = 7
(2.) -2x+y-3(x+2y) = -10

(ii)   Jika   x = -2   y = ⅓
(1.) 2(3x-6y)+3(5y-2x) = 1
(2.) (-12x²y) ÷ (-4x) = -2

Penjelasan dengan langkah-langkah:
(i) Diketahui   x = 5   y = -3   Tentukan
(1.) 4(x-2y)-(2x-9y) = 4x-8y-2x+9y
= 2x+y = 2(5)-3 = 10-3 = 7
(2.) -2x+y-3(x+2y) = -2x+y-3x-6y = -5x-5y
= -5(x+y) = -5(5-3) = -5(2) = -10

(ii) Diketahui   x = -2   y = ⅓   Tentukan
(1.) 2(3x-6y)+3(5y-2x) = 6x-12y+15y-6x
= 3y = 3(⅓) = 1
(2.) (-12x²y) ÷ (-4x) = 3x²⁻¹y = 3x¹y = 3xy
3y(x) = 1(-2) = -2

(xcvi)

Answer 2

Penjelasan dengan langkah-langkah:

• jawabannya ada di gambar