Hi,
We know that:
a² -- b² = (a -- b)(a + b).
With a = x, and b = 4, we have:
x² -- 16 = x² -- 4² = (x -- 4)(x + 4).
As simple as that. Have you understood ?
Green eyes.
Answer:
if you are finding x,
x = 15
Step-by-step explanation:
2(5x-6) = 3(3x+1)
10x - 12 = 9x + 3
10x = 9x + 15
x = 15
Answer:
Step-by-step explanation:
For a coin, the probability of head showing in a single toss is 
.
Its complement, the probability of not head is
This is a binomial distribution. In 
tosses, the probability of having all heads (i.e. heads) is
Let's call this value 
.
For 
coins, we determine the probability of at least 1 coin showing all heads by first finding its complement i.e. the probability of no coin showing all heads. This is also a binomial distribution.
Answer:
Step-by-step explanation:
i think this has already been answered
