Question

Exercitiile 8 si 9 va rog
.Multumesc

Answer 1

Răspuns:

Explicație pas cu pas:

8.

a) x^2y(1 - 3 + 3) + xy^2 (5 + 6 - 2) = x^2y + 9xy^2.

b)

a^2 (5 - 1 + 1) + b^2 (1 - 3 - 1) + ab (3 - 2 + 4) = 5a^2 - 3b^2 + 5ab

c)

m(6 - 3 - 3) + n(3 - 2 + 4) - 5 + 6 = 5n + 1

d)

m^2 (13 - 2 - 10) + n^2 (-1 - 4) + mn (2 - 3 - 2) = m^2 - 5n^2 - 3mn

_____________

9.

a)

√2(7 + 11 + 12 - 5) = 25√2

b)

√2x (7 + 11 + 12 - 5) = 25√2x

c)

√3x (2 - 5 + 12 + 1 - 10) = 0

d)

√2x (5 - 3) + √3x (3 + 2 + 1) = 2√2x + 6√3x