Question

calculati b)2√8+3√18-13√2. c)√2(√2+√3)-√3(2√3+√2.). d)(√2-√12)(√8+√3). pls am nevoie urgent ​

Answer 1

Răspuns:

Explicație pas cu pas:

b)

2√8 + 3√18 - 13√2

= 2 × 2√2 + 3 × 3√2 - 13√2

= 4√2 + 9√2 - 13√2

= 13√2 - 13√2

= 0

c)

√2(√2 + √3) - √3(2√3 + √2)

= 2 + √6 - 2 × 3 - √6

= 2 - 6

= - 4

d)

(√2 - √12)(√8 + √3)

= (√2 - 2√3)(2√2 + √3)

= 2 × 2 + √6 - 4√6 - 2 × 3

= 4 - 3√6 - 6

= - 2 - 3√6