Question

Urgent va roggg

Efectuați pe DVA: ​

Answer 1

Răspuns:

a) X^2 + 2X # 0 =>X#{0, -2)

(4 - X^2) = (2 - X)(2 + X) # 0 =>X#{2, -2}

=> X#{-2, 0, 2}

b) X(X+4) # 0 =>X#{-4, 0}

X(X-4) # 0 =>X#{0, 4}

=> X#{-4, 0, 4}

c) 9-X^2 # 0 =>X#{-3, 3}

d) X(X-5) # 0 =>X#{0, 5}

e) X^2 - 64 # 0 =>X#{-8, 8}

f) X^2 - 1 # 0 => X#{-1, 1}