Question

Hasil perkalian bentuk aljabar berikut :
1. 2p(3q - 5) + 4q(p + 5)
2. 3s(2t + s) - 5t(3s - 2t)
3. (2n + 3m)(n + 4m)
4. (4n - m)(3n - 2m)
5. (2t + 3s)(4s - t)

MOHON DIJAWAB YA

Answer 1

1.)2p.4q = 8pq
•3q.p=3qp
•3q.5=15q
•-5.p=-5p
•-5.5=-25
=8pq + 3qp + 15q - 5p - 25
2.)3s.-5t=-15st
•2t.3s=6ts
•2t.-2t=-4t²
•s.3s=3s²
•s.-2t=-2st
=-15st + 6ts - 4t² + 3st - 2st
= - 15 st + 3st - 2st = -14st
= - 14st + 6ts - 4t²
3.)2n.n=2n²
•2n.4m=8nm
•3m.n=3mn
•3m.4m=12m²
=2n² + 8nm + 3mn + 12m²
4.)4n.3n=12n²
•4n.-2m=-8nm
•-m.3n=-3mn
•-m.-2m=2m²
=12n² - 8nm - 3mn + 2m²
5.)2t.4s=8ts
•2t.-t=-2t²
•3s.4s=12s²
•3s.-t=-3st
=8ts - 2t² + 12s² - 3st
=8st - 3st = 5st
=5st -2t² +12s²
maaf kalau ada yg salah ya :D