1. (x² + 24) factors as the difference of two squares (x² - (-24)) where -24 is the square of the complex number i√24 = 2i√6. The factoring is
(x - 2i√6)(x + 2i√6)
2. The square of half the coefficient of the x-term needs to be added: 4.5² = 20.25
This number goes in both boxes.
3. This is the square of (y² +20), so the factorization is similar to that for problem 1.
y⁴ + 40y² + 400 = (y² + 20)² = (y -2i√5)²(y +2i√5)²
The formula is 4 cos^3(x)-3 cos(x)
3/7 - I got there by dividing the numerator and denominator each by 5
Answer:
y = (12 - 4x)/5
Step-by-step explanation:
5y = 12 - 4x
y = 12/5 - 4x/5
y = (12 - 4x)/5
7- B
8- C
I’m pretty sure please don’t hurt me if I’m wrong