Question

упростить
1) (x^2-9):(x+3)
2) (a-b)^2:(a^2-b^2)
3) (25-x^2):(x+5)

Answer 1

1) = (х-3)*(х+3) : (х+3) = х-3
2) = (a-b)(a-b) : (a-b)(a+b) = (a-b) / (a+b)
3) (5-х)(5+х) : (5+х) = 5-х