enchanteddream enchanteddream

21-04-2020
Mathematics

contestada

(y+6)^2-(y-2)^2

I got 16y+26 but it is wrong?

Respuesta :

joy123333 joy123333

22-04-2020

Answer:

16y + 32

Step-by-step explanation:

Expand each term.

(y+6)² - (y-2)²

= (y+6)(y+6) - (y-2)(y-2)

= y² + 12y + 36 - (y² - 4y + 4)

Subtract the second group by changing each term's signs

= y² + 12y + 36 - y² + 4y - 4

Collect like terms

= 16y + 32

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