mehhh14 mehhh14

08-06-2019
Mathematics

contestada

find the value of x^3+y^3+15xy-125 if x+y=5

Respuesta :

freckledspots freckledspots

08-06-2019

Answer:

0

Step-by-step explanation:

x+y=5

x^3+y^3+15xy-125

(x+y)(x^2-xy+y^2)+15xy-125

5(x^2-xy+y^2)+15xy-125

5x^2+5y^2-5xy+15xy-125

5x^2+5y^2+10xy-125

5[x^2+2xy+y^2]-125

5(x+y)^2-125

5(5)^2-125

125-125

0

Answer Link

Otras preguntas

Which is not a feature of La Republica Dominicana? -Fishing industry -Coral Reef -Beaches -Space Center

An airplane climbs at an angle of 13 with the ground . What is the distance it has traveled when it has attained an altitude of 400 feet

Bag a contains 4 red and 3 blue tickets. bag b contains 3 red and 1 blue ticket. a bag is randomly selected by tossing a coin and one ticket is removed from it.

Much of the worlds fresh water is tied up in glaciers and polar ice caps. what percent of the water on the planet is available for our use?

Compression of the abdominal wall occurs by what four muscles

what would happen if you rubbed a piece of fluoride against a peice of feldspar

Describe the role of the cochlea in hearing.

Please help me!!!!!!

what refers to care of a child in someone else's home?

The length of a rectangle is 2ft longer than its width. If the perimeter of the rectangle is 32ft, find its area.