Question

5x-2y=7 and xy = 2 find the value of (5x + 2y)^2

Answer 1

5x-2y=7
xy=2

(5x+2y)^2

let 5x=a
2y=b

(a+b)^2=(a-b)^2+4ab

(5x+2y)^2=(5x-2y)^2+4xy

=7^2+4×2

=49+8
= 57ans...

HOPE IT HELPFUL FOR U. :-)

Answer 2

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