8. 5a (P-q) + 7a (P+q)=
11. 4(a+3) + 2(3a-1)=
12. 3(3x-4y) + 2(2x+y)=
13. -5(2x+1) - 2(3x-2)=
14. -1(-3a+b) + (b-a)=
15. 5(x-4)-3(-x+2)=
Dibawanya buat tugas besok dikumpul
Jawab:
7. = 4[tex]xy^{2}[/tex]
8. = 12ap + 2aq
11. = 10a + 10
12. = 13x - 10y
13. = - 16x + 1
14. = 2a
15. = 8x - 26
Penjelasan dengan langkah-langkah:
7. 2mn(m+n) - 2nm(m-n)=
=2[tex]x^{2}[/tex]y + 2[tex]xy^{2}[/tex] - 2[tex]x^{2}y + 2xy^{2}[/tex]
= 2[tex]x^{2} y[/tex] - 2[tex]x^{2} y[/tex] + 2[tex]xy^{2}[/tex] - 2[tex]xy^{2}[/tex]
= 2[tex]xy^{2}[/tex] + 2[tex]xy^{2}[/tex]
= 4[tex]xy^{2}[/tex]
8. 5a (P-q) + 7a (P+q)=
= 5ap - 5aq + 7ap +7aq
= 5ap + 7ap - 5aq + 7aq
= 12ap + 2aq
11. 4(a+3) + 2(3a-1)=
= 4a + 12 + 6a - 2
= 4a +6a + 12 - 2
= 10a + 10
12. 3(3x-4y) + 2(2x+y)=
= 9x - 12y + 4x + 2y
= 9x + 4x - 12y + 2y
= 13x - 10y
13. -5(2x+1) - 2(3x-2)=
= -10x -1 - 6x + 2
= -10x - 6x -1 + 2
= - 16x + 1
14. -1(-3a+b) + (b-a)=
= 3a -b + b - a
=3a - a -b + b
= 2a
15. 5(x-4)-3(-x+2)=
= 5x - 20 + 3x - 6
= 5x +3x - 20 - 6
= 8x - 26
CMIIW
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