(6a + b)^2
= 36a^2 + 12ab +b^2

Yes, that's correct. In vertebrates, including humans, hormones are chemical messengers that are secreted by specialized glands called endocrine glands. These hormones are released into the bloodstream and travel to target cells or organs, where they exert their effects by binding to specific receptors on the surface of the target cells or by entering the cells and affecting gene expression.

y9 ÷ y3

= y^6

-mnp(3m - 5n + 7p)

= -3m^2np + 5mn^2p - 7mnp^2

-mnp(3m - 5n + 7p)

= -3m^2np + 5mn^2p - 7mnp^2

(6a + b)^2

(6a + b)(6a + b)

36a^2 + 6ab + 6ab + b^2

= 36a^2 + 12ab + b^2

(2p + 7)(3p - 9)

6p^2 + 21p - 18p - 63

= 6p^2 + 3p - 63