If 5x – 2y = 7 and xy = 2, find the value of (5x + 2y)*2
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Answered by
5
Answer:
129
Step-by-step explanation:
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Answered by
1
Answer:
129
Explanation:
5x-2y=7
therefore,(5x-2y)^2=49
therefore,25x^2+4y^2-20xy=49
25x^2+4y^2-20×2=49
25x^2+4y^2-40=49
25x^2+4y^2=49+40
25x^2+4y^2=89
(5x+2y)^2=25x^2+4y^2+20xy
=89+20×2
=89+40
=129.
please mark this answer as brainliest
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