Question

if 2x-5y=10and xy=2find the value of 4x²+25y²6​

Answer 1

Answer:

4x^2+25y^2

(2x)^2+(5y)^2

(2x-5y)^2+2.2x.5y

10^2+20.2=100+40=140

Answer 2

Step-by-step explanation:

given that 2x-5y=10

xy=2

we have to find 4x²+25y²=?

now,

(2x-5y)² = 4x²+25y²-20xy

(10)² = 4x²+25²-20× 2

100 = 4x²+25²-40

4x²+25² = 100+40

4x²+25² = 140

hence, right answer is 140