Question

( 4 - y ) 2 - ( y + 1 ) ( y - 1)

Answer 1

Объяснение:

(4-у)^2-(у-1)^2=4^2-2*4*у+у^2-у^2-1^2= 16-8у+у^2-1=15-8у+у^2

Я не знаю что делать дальше, так что ответ такой

Answer 2

To simplify the expression (4 - y)^2 - (y + 1)(y - 1), you can follow these steps:

1. Expand (4 - y)^2 using the binomial square formula (a - b)^2 = a^2 - 2ab + b^2:

(4 - y)^2 = 16 - 8y + y^2

2. Expand (y + 1)(y - 1) using the distributive property (FOIL):

(y + 1)(y - 1) = y^2 - y + y - 1 = y^2 - 1

Now, you can substitute these expanded forms back into the original expression:

(16 - 8y + y^2) - (y^2 - 1)

Now, distribute the negative sign to both terms inside the parentheses:

16 - 8y + y^2 - y^2 + 1

Next, simplify the expression by combining like terms:

(16 + 1) - 8y - y^2 + y^2

Combine the constants (16 + 1) = 17:

17 - 8y

So, the simplified expression is 17 - 8y.