Find the product of (x² - 5)² using identities

Step-by-step explanation:

by idetity : (a - b)²= a² +b² -2ab

for : (x² - 5)² you have  a = x²  and b = 5

(x² - 5)²= (x²)²+5² - 2(5)(x²)

(x² - 5)²= x^4+25 -10x²

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80