X^2 + 8xy + y^2

completely factorize this.

i think it is not possible to solve there is an answer for this in the book and it says (4x + y )^2

guide me how : )

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me

Mikes car gets an average of 28 mpg. there are 12 gallons of fuel in mikes car when he starts his trip of 140 miles. about how many gallons are left at the end of his trip?

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer