Question

(y – 4)(y + 4) - (y +9)2 = – 7.​

Answer 1

Ответ:

-5

Пошаговое объяснение:

Раскрывая скобки:

-16-18у-81=-7   / квадраты у сокращаются, удобно пользоваться формулами разности квадратов и квадрата суммы/

18у=-9-81

2у=-10

у=-5

Answer 2

Let's solve the equation step by step:

1. Expand both sides of the equation: (y - 4)(y + 4) - (y + 9)^2 = -7

   Using the distributive property: (y^2 + 4y - 4y - 16) - (y^2 + 18y + 81) = -7

2. Simplify the equation by combining like terms: (y^2 - y^2) + (4y - 4y) - 16 - 81 = -7

3. Further simplify: -97 = -7

At this point, we can see that the equation doesn't make sense. The left side is a constant (-97), and the right side is also a constant (-7), but they are not equal. This means that there is no solution to the equation, and it is inconsistent.

So, the given equation has no solution.