Question

ДАЮ 40 БАЛЛОВ!!1
СРОЧНО НАДО РЕШИТЬ!1

a) (x1 - 5xx + 2) : (x-3)(x+2)

b) (6x+y)3x - 5y^2x2 * x15y

c) (x+y)(x-y) - (x-y)(x+y) * xyx^2 - y^2

: - деление, если что.

Answer 1

a) (x1 - 5xx + 2) : (x-3)(x+2)=(x²+2x-5x)/(x+2)*(x+2)/(x-3)=
=(x²-3x)/(x-3)=x(x-3)/(x-3)=x

b) (6x+y)3x - 5y^2x2 * x15y=(6x+y)/3x-y/3x=(6x+y-y)/3x=6x/3x=2

c) (x+y)(x-y) - (x-y)(x+y) * xyx^2 - y^2=(x+y)/(x-y)-xy/(x+y)²=
=(x³+x²y+xy²+y³-x²y+xy²)/[(x-y)(x+y)²]=(x³+2xy²+y³)/[(x-y)(x+y)²]

Answer 2

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