if 5x - 2y = 7 and xy = 2 , find the value of ( 5x + 2y ) ^2
plz answer it fast..
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Answered by
3
93
Step-by-step explanation:
25x2+ 4y2-20xy = 49
25x2+4y2 =49+40=89
( 5x + 2y ) ^2 = 25x^2 + 4y^2 +2xy
=89+2(2)
=93
Answered by
34
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