(a+b)² can also be written as (a+b) (a+b). When you expand this you get a²+2ab+b²
(a-b)² can also be written as (a-b) (a-b). When expanded this gives a²-2ab-b2
As you can see, this leads to different coefficients of the 'ab' values: for (a+B) ² its 2 for (a-b) ² its - 2
600 is 10 times larger than 60
Answer:
4
Step-by-step explanation:
20 percent * 20 =
(20:100)* 20 =
(20* 20):100 =
400:100 = 4
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Answer:
b = -23/16
Step-by-step explanation:
The variable x can be eliminated from the system by multiplying the first equation by -2 and adding that to the second equation.
-2(-4b +x) +(8b +2x) = -2(7) +(-9)
16b = -23 . . . . . collect terms
b = -23/16 . . . . divide by the coefficient of b
The value of b is -23/16 = -1 7/16.
when "If P, then Q" is true, "if not Q, then not P¨ is also true.
So the given statement is true.
<h3>
The statement is true or false?</h3>
Let's suppose we have a conditional statement:
If P, then Q.
That is true.
The statement says that:
If not Q, then not P.
Is also true.
Now, let's go to the original conditional statement.
"If P, then Q"
This means that always that P is true, then Q must also be true. But we can have cases where P is false and Q is true. (this means that Q can't be true if P is not true).
Now, if we affirm that Q is false (or not Q is true, these are the same thing). Then we must have that P is also false (or not P is true).
So the given statement is true.
when:
If P, then Q
is true.
if not Q, then not P¨
is also true.
If you want to learn more about conditional statements:
brainly.com/question/11073037
#SPJ1
