7x³ = 28x is our equation. We want its solutions.
When you have x and different powers, set the whole thing equal to zero.
7x³ = 28x
7x³ - 28x = 0
Now notice there's a common x in both terms. Let's factor it out.
x (7x² - 28) = 0
As 7 is a factor of 7 and 28, it too can be factored out.
x (7) (x² - 4) = 0
We can further factor x² - 4. We want a pair of numbers that multiply to 4 and whose sum is zero. The pairs are 1 and 4, 2 and 2. If we add 2 and -2 we get zero.
x (7) (x - 2) (x + 2) = 0
Now we use the Zero Product Property - if some product multiplies to zero, so do its pieces.
x = 0 -----> so x = 0
7 = 0 -----> no solution
x - 2 = 0 ----> so x = 2 after adding 2 to both sides
x + 2 = 0 ---> so = x - 2 after subtracting 2 to both sides
Thus the solutions are x = 0, x = 2, x = -2.
Answer:
49 1/6 meters
Step-by-step explanation:
P = 2(73/3) + 2(61/4)
= 146/3 + 61/2
= 48 2/3 + 30 1/2
= 48 4/6 + 30 3/6
= 48 + 7/6
= 48 + 1 1/6
= 49 1/6
Answer: divide by 100 is .0937
Step-by-step explanation:
Answer:
Solo se puede usarlas con triángulos rectángulos (right triangles en ingles).
Experimentally we got a five 9 times out of 50
Answer: 9/50
Last choice
