Question

restabiliti sirul de rapoarte algebrice egale: x+y supra x-y=x la patrat-y la pătrat supra ???? = ???? supra 7y -7x=3y patrat -3x pătrat supra ?????

Answer 1

(x+y)/(x-y) = (x^2 - y^2)/A

A(x+y) = (x-y)(x^2 - y^2)

A = (x-y)^2

(x+y)/(x-y) = B/7(y-x)

B(x-y) = -7(x-y)(x+y)

B = -7(x+y)

(x+y)/(x-y) = -3(x^2 - y^2)/C

C = -3(x^2 - y^2)(x-y)/(x+y)

C = -3(x-y)^2