Question

-2(у-5)(у+1)-(у-7)(у+7)

Answer 1

= -2y^2-2y+10y+10-y^2+49=-3y^2+8y+59

Answer 2

Let's start by simplifying each term using the distributive property:

-2(у-5)(у+1) = -2(у^2 - 4у - 5) = -2у^2 + 8у + 10

(у-7)(у+7) = у^2 - 49

Now, substituting these values back into the original expression, we get:

-2(у-5)(у+1)-(у-7)(у+7) = (-2у^2 + 8у + 10) - (у^2 - 49) = -2у^2 + 8у + 10 - у^2 + 49 = -3у^2 + 8у + 59

Therefore, the simplified form of the expression is -3у^2 + 8у + 59.