Question

The sum of two numbers is -11/12.one of them is 9/2.find the other.

Answer 1

Step-by-step explanation:

Let two number be x and y

Given,x+y=9 and xy=20

Now,x+y=9

Squaring both the sides,

(x+y)

2

=9

2

=>x

2

+y

2

+2xy=81

=>x

2

+y

2

+2(20)=81

=>x

2

+y

2

+40=81

=>x

2

+y

2

=81−40

=>x

2

+y

2

=41

Now,

x

3

+y

3

=(x+y)(x

2

−(x)(y)+y

2

)

=(9)(41−20)

=9(21)

=189

IT'S JUST EXAMPLE SOLVE ON YOUR OWN IT WILL HELP U IN EXAMS

Answer 2

Hey dear!!

Given,

Sum of two rational nos. = -7

One no. is -5/2

Now, Suppose the other no. be x

-5/2 + x = -7

x = -7 + 5/2

x = -14+5/2

x = -9/2

Therefore, the other no. is -9/2.

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