How to solve this equation (2a - 2) (a + 1) =0

2 answers:

6 0

Since the left side is a product of the two parenthetical terms, if either of them is equal to zero the equation is true, because anything time zero equal zero. So the two solutions to that equation are when

2a-2=0

2a=2

a=1

and

a+1=0

a=-1

So the two solutions occur when a=-1 and 1

Darya [45]3 years ago

3 0

Since anything multiplied by zero produces zero, we can say 0(a + 1) = 0 and (2a - 2)(0) = 0.

Thus, 2a - 2 = 0 or a + 1 = 0
2a = 2
a = 1

a = -1

We can conclude that a = 1 or - 1 will produce the end result as 0.

You might be interested in

What is the LCM of 20 and 40? 5 10 20 40

zepelin [54]

Answer:

i think this is the answer

4 0

2 years ago

A scientist inoculates mice, one at a time, with a disease germ until he finds 3 that have contracted the disease. If the prob

UkoKoshka [18]

Answer:

The probability that 8 mice are required is 0.2428.

Step-by-step explanation:

Given : A scientist inoculates mice, one at a time, with a disease germ until he finds 3 that have contracted the disease. If the probability of contracting the disease is two sevenths.

To find : What is the probability that 8 mice are required? The probability that that 8 mice are required is nothing ?

Solution :

Applying binomial distribution,

$P(X=r)=^nC_r p^rq^{n-r}$