gbkim27 gbkim27
  • 02-04-2022
  • Mathematics
contestada

given that 2x^2 - 2y^2 = 40 and x-y=5, find the value of (x+y)

Respuesta :

ghanami
ghanami ghanami
  • 02-04-2022

Answer:

x+y=4

Step-by-step explanation:

hello :

note :  by identity  you have   x²-y² = (x-y)(x+y)

in this exercice : 2x²-2y² = 2(x²-y²) = 2 (x-y)(x+y)

means :   2 (x-y)(x+y) = 40

but x-y = 5

so : 2(5)(x+y) =40

x+y=40/10

x+y=4

Answer Link

Otras preguntas

AngleDFG and angleJKL are complementary angles. M angleDFG =x+5, and m angleJKL=x-9. Find the measure of each angle
Solve for the variable X=5y for y
How to simplify square root of 210?
why does salt separated from a salt water solution look different than the salt that dissolved in the water
how do you compare 1/5 and 0.201
Which causes athlete’s foot?
a gardener has 27 pansies and 36 daisies he plants an equal number of each type of flower in each row what is the greatest possible number of pansies and daisie
how do you compare 1/5 and 0.201
How many Jews did Adolf Hitler killed
write two integers with different signs that have a sum of -25. write two integers with the same sign that have a sum of -25