2 years ago

If a+b= -1 then the value of a^3+b^3 - 3ab= ?

Mathematics

1 answer:

Neporo4naja [7]2 years ago

5 0

Answer:

-1

Step-by-step explanation:

$(a + b)^{3} = {a}^{3} + {b}^{3} + 3ab(a + b) \\ ( - 1)^{3} = {a}^{3} + {b}^{3} + 3ab( - 1) \\ - 1 = {a}^{3} + {b}^{3} - 3ab\\ \\ \huge \red{ \boxed{{a}^{3} + {b}^{3} - 3ab = - 1}}$

You might be interested in

What is the value of x in the equation: 3x – 5x + 10 = 36

nika2105 [10]

This is the answerrrrrrrrr

5 0

2 years ago

Read 2 more answers

Which is the length of side AD?<br> 1 unit<br>4 units<br>5 units<br>6 units

Solnce55 [7]

The length side of AD is 4 units

4 0

3 years ago

Read 2 more answers

The second term in a geometric sequence is 20. The fourth term in the same sequence is 45/4 or 11.25. What is the common ratio i

kati45 [8]

$\bf \begin{array}{ccll}
n&term&value\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
2&a_2&20\\
3&a_3&20r\\
4&a_4&20rr\\
&&20r^2\\\\
&&\frac{45}{4}
\end{array}\implies \stackrel{4^{th}~term}{20r^2=\cfrac{45}{4}}\implies r^2=\cfrac{45}{80}
\\\\\\
r^2=\stackrel{simplified}{\cfrac{9}{16}}\implies r=\sqrt{\cfrac{9}{16}}\implies r=\cfrac{\sqrt{9}}{\sqrt{16}}\implies r=\cfrac{3}{4}$

4 0

3 years ago

Takira is an appointment-setter for a sales organization. She makes $12 an hour plus a $3 fee for each appointment that is sched

aksik [14]

12 x 40 = hours she worked = 480

3 x 31 = appointment fee = 93
480 + 93 = 573

5 0

3 years ago

Can someone help me with this

trasher [3.6K]

Answer:

Angle 3 is 65°, Angle 8 is 115°

Step-by-step explanation:

Angle 3 and 1- Linear Pair

Angle 8 and 1- Alternate Exterior

7 0

3 years ago