Tolong bantu jawab donk makasih

Jawaban:

1. 3√2 × √75 : √54

= 3√2 × √3×25 : √6×9

= 3√2 × 5√3 : 3√6

= 15√6 ; 3√6

= 5 c.

2. (49^-2)^3/4

= (7^2×-2)^3/4

= 7^-4×3/4

= 7^-3

= 1/343 (A)

3. x2 – 10x + 20

p^2+q^2 = (p+q)^2 – 2pq = (-b/a)^2 – 2c/a

= (-(-10)/1)^2 – 2.20/1

= 100 – 40 = 60(A)