Сократите дробь: 1)x^2+3x ________ 3a+ax 2) b^2 ___________ b^2+bc 3) 2a+4 _________ a^2-4 4) x^2-y^2 __________ x^2-xy
1) x(x+3) = x a(3+x) a 2) b² = b b(b+c) b+c 3) 2(a+2) = 2 (a+2)(a-2) a-2 4) (x+y)(x-y) = x+y x(x-y) x