Question

VA ROGGGGGGGG URGENT DAU COROANAAAAAAA ​

Answer 1

Răspuns:

$\frac{ {x}^{2} - 18x + 81}{ {x}^{2} - 81 } = \frac{ {(x - 9)}^{2} }{(x - 9)(x + 9)} = \frac{x - 9}{x + 9}$

b),(x-6)(x+6)/(x-6)^2=(x+6)/(x-6)

c)(x-8)(x+8)/(x+8)^2

d)(x+5)^2/x(x-5)(x+5)=(x+5)/x(x-5)

e)x(x-7)(x+7)/x(x+7)^2=(x-7)/(x+7)

f)x^2(x-10)(x+10)/x(x+10)^2=x(x-10)/(x+10)

11.a)(x-3)(x+3)/(x^2+5x+15-9)=

(x-3)(x+3)/(x^2-9+5x+15)=

(x-3)(x+3)/(x+3)(x-3+5)=(x-3)/(x+2)

domeniul de definiție R-{-2}

b)(x^2-25)/(x+6)(x+5)=(x-5)/x+6)

D:R-{-6}

c)(x+3)^2/(x+3)(x+4)=(x+3)/(x+4)

D:R-{-3;-4}

d)(x-2)(x-3)/(x-2)^2=(x-3)/(x-2)

D:R-{2]

e)(x+4)^2/(x+4)(x+3)=(x+4)/(x+3)

D:R-{-3}

f)