Answer:
Step-by-step explanation:
![\frac{3}{x^2-9} +\frac{5}{x+3} \\=\frac{3}{(x+3)(x-3)} +\frac{5}{x+3} \\=\frac{3+5(x-3)}{(x+3)(x-3)} \\=\frac{3+5x-15}{x^2-9} \\=\frac{5x-12}{x^2-9}](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7Bx%5E2-9%7D%20%2B%5Cfrac%7B5%7D%7Bx%2B3%7D%20%5C%5C%3D%5Cfrac%7B3%7D%7B%28x%2B3%29%28x-3%29%7D%20%2B%5Cfrac%7B5%7D%7Bx%2B3%7D%20%5C%5C%3D%5Cfrac%7B3%2B5%28x-3%29%7D%7B%28x%2B3%29%28x-3%29%7D%20%5C%5C%3D%5Cfrac%7B3%2B5x-15%7D%7Bx%5E2-9%7D%20%5C%5C%3D%5Cfrac%7B5x-12%7D%7Bx%5E2-9%7D)
Answer:
2
Step-by-step explanation:
The constant -h is half the x-coefficient -4, so is -2. That makes h = 2.
The square of the binomial (x-h) is ...
... (x -h)² = x² -2hx +h²
Comparing x-terms, you see that ...
... -2xh ≡ -4x
... h = (-4x)/(-2x) = 2
Answer:
75 cm
Step-by-step explanation: