Penjelasan dengan langkah-langkah:

1) 64^½ x 32^3/5

= (8²)^½ x (2^5)^3/5

= 8^(2x½) x 2^(5 x 3/5)

= 8^(2/2) x 2^(15/5)

= 8¹ x 2³

= 8 x 8

= 64

2) ?

3) 24/√3 = 24/√3 x √3/√3

= (24√3)/(√3x3)

= (24√3)/√9

= (24/3)√3

= 8√3

4) Jumlah = (2+5) x 120.000/(5–2)

= 7 x 120.000/3

= 7 x 40.000

= Rp. 280.000,oo

5) B + S = 36 → S = 36 – B

4B – 2S = 128

4B – 2(36 – B) = 128

4B – 72 + 2B = 128

6B = 128 + 72

6B = 200

B = 200/6

B = 33 soal

6) 10 x 64 = 8 x (64 + p)

640 = 512 + 8p

8p = 640–512

p = 128/8

p = 16 orang tambahan pekerja

7) Barisan –5, –2, 1, 4, ...

a = –5

b = 4–1 = 3

U50 = a + (50–1)b

U50 = –5 + 49x3

U50 = 50x3 –8

U50 = 150 – 8

U50 = 142

8) Panjang tali mula² = 5 x (40 + 80)/2

= 5 x 120/2

= 5 x 60

= 300 cm

= 3 meter

9) Harga beli = 16.200.000/(100–10)%

= 16.200.000/90%

= 16.200.000/90 x 100

= 180.000 x 100

= Rp. 18.000.000,oo

10) (2a – 3b)(2a + 5b)

= 2a(2a + 5b) – 3b(2a + 5b)

= 4a² + 10ab – 6ab – 15b²

= 4a² + 4ab – 15b²