Question

(3y+1)2-9(y+1)(y-1)=8y-16

Answer 1

Вот держи  

Вроде правильно

Answer 2

Let's start by expanding the left side of the equation using the distributive property:

(3y + 1)² - 9(y + 1)(y - 1) = (3y + 1)(3y + 1) - 9(y² - 1) = 9y² + 6y + 1 - 9y² + 9 = 6y + 10

Now we can substitute this expression back into the original equation:

6y + 10 = 8y - 16

Next, we'll isolate the variable terms on one side of the equation and the constant terms on the other:

6y - 8y = -16 - 10

Simplifying both sides, we get:

-2y = -26

Finally, we can solve for y by dividing both sides by -2:

y = 13

Therefore, the solution to the equation is y = 13.