Question

Срочно нужно решить!

Answer 1

Ответ:

Объяснение:

а)16-(1/81)у⁴=(4-(1/9)*у²)(4+(1/9)*у²)=

=(2-1/3*у)(2+1/3*у)(4+(1/9)*у²);

б)а+а²-b-b²=a-b+a²-b²=a-b+(a-b)(a+b)=

=(a-b)(a+b+1)

Answer 2

$\displaystyle 1)16-\frac{1}{81}y^4=\frac{1}{81}(1296-y^4)=\frac{1}{81}(36-y^2)(36+y^2)=\frac{1}{81}(6-y)(6+y)(36+y^2)\\ \\2) a+a^2-b-b^2=a+(a-b)(a+b)-b=(a-b)(1+a+b)$