Question

solve the quadratic equation x-y=40,x+y=10​

Answer 1

Answer:

{ x,y } = { 25 , –15 }

Answer 2

Answer:

x=25, y=-15

Step-by-step explanation:

Let x-y=40 be the equation 1 and

x+y=10 be the equation 2

If we added equation 1 and 2 we get

(x-y)+(x+y)=40+10

x-y+x+y=50

2x=50

x=25

If we put the value of x in equation 1 or 2 we get

x-y=40

-y=40-x

y=x-40

y=25-40

y=-15