Question

5x+2y whole square -2x+5y whole square

Answer 1

Answer:

y

x

=

4

3

(Given)

Dividing by y on numerator and denominator,

5x−2y

4x+5y

=

5

y

x

−2

4

y

x

+5

=

5×

4

3

−2

4×

4

3

+5

=

4

15−8

8

=

7

8×4

=

7

32

Answer By king arif

Answer 2

Step-by-step explanation:

Using formula:

(a+b)²=a²+2ab+b²

we have,

(5x+2y)²-(2x+5y)² = ((5x)²+ 2.5x.2y + (2y)²)-((2x)²+ 2.2x.5y+ (5y)²)

=(25x²+20xy+4y²) - (4x²+20xy+25y²)

=25x²+20xy+4y²- 4x²-20xy-25y²

=21x²-21y²