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sveticcg [70]
3 years ago
6

Subtract 2ab from -2ab

Mathematics
2 answers:
Allushta [10]3 years ago
6 0

Answer:

-4ab.

Step-by-step explanation:

If the temperature is -2 degrees and it goes down another 2 degrees the new temperature is -2-2 = -4.

-2ab - 2ab = -4ab.

Rus_ich [418]3 years ago
4 0

Answer:

-4ab because if you have a balance of negative two dollars and you spend two more dollars you have a balance of negative 4 dollars

Step-by-step explanation:

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Which expression represents the number 2i4−5i3+3i2+−81‾‾‾‾√ rewritten in a+bi form?
vichka [17]

Answer:

The expression -1+14i represents  the number 2i^4-5i^3+3i^2+\sqrt{-81} rewritten in a+bi form.

Step-by-step explanation:

The value of i is i=\sqrt{-1}[tex] or [tex]i^{2}=-1[\tex].Now [tex]i^{4} in term of i^{2}[\tex] can be written as, [tex]i^{4}=i^{2}\times i^{2}

Substituting the value,

i^{4}=\left(-1\right)\times \left(-1\right)

Product of two negative numbers is always positive.

\therefore i^{4}=1

Now i^{3} in term of i^{2}[\tex] can be written as, [tex]i^{3}=i^{2}\times i

Substituting the value,

i^{3}=\left(-1\right)\times i

Product of one negative  and one positive numbers is always negative.

\therefore i^{3}=-i

Now \sqrt{-81} can be written as follows,

\sqrt{-81}=\sqrt{\left(81\right)\times\left(-1\right)}

Applying radical multiplication rule,

\sqrt{ab}={\sqrt{a}}\sqrt{b}

\sqrt{\left(81\right)\times\left(-1\right)}={\sqrt{81}}\sqrt{-1}

Now, \sqrt{\left(81\right)=9 and \sqrt{-1}}=i

\therefore \sqrt{\left(81\right)\times\left(-1\right)}=9i

Now substituting the above values in given expression,

2i^4-5i^3+3i^2+\sqrt{-81}=2\left(1\right)-5\left(-i\right)+3\left(-1\right)+9i

Simplifying,

2+5i-3+9i

Collecting similar terms,

2-3+5i+9i

Combining similar terms,

-1+14i

The above expression is in the form of a+bi which is the required expression.

Hence, option number 4 is correct.

5 0
3 years ago
Which shows one way to determine the factors of x - 9x2 + 5x – 45 by grouping?
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Answer:

The last one.

Step-by-step explanation:

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What is the area of rectangle PQRS with vertices at P(0, 2), Q(0, 10), R(4, 10), and S(4, 2)?
Cerrena [4.2K]

Answer:

D..... 40

Step-by-step explanation:

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3 years ago
What is the differance between constructing a square and construciting an eguilateral triangle
Aleksandr-060686 [28]

Answer:

One has 4 sides and one has 3 sides

Step-by-step explanation:

a square has 4 sides and an equilateral triangle has 3 sides

3 0
3 years ago
Read 2 more answers
Parallel lines never intersect, therefore, there is one solution
anyanavicka [17]

Answer:

Step-by-step explanation:

If parallel lines don't intersect, then there can't be any solutions. An intersection represents a solution.

If this is a true false question, the statement is false.

6 0
3 years ago
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