Question

Решите (5-y)(1-y)+4 (y-8)(y-7)-60

Answer 1

1) 5-5y-y+y²+4= y²-6y+9

2) y²-7y-8y+56-60= y²-15y-4

Answer 2

To solve this expression, we can start by expanding the two terms using the distributive property:

(5 - y)(1 - y) + 4(y - 8)(y - 7) - 60

= (5 - 5y - y + y^2) + 4(y^2 - 15y + 56) - 60

= 5 - 5y - y + y^2 + 4y^2 - 60y + 224 - 60

= 5 - 6y + 5y^2 + 4y^2 - 60y + 164

= 9y^2 - 66y + 169

Therefore, the expression simplifies to 9y^2 - 66y + 169.