5x-2y=7,xy=2 find (5x+2y)^2
Answers
Answered by
3
Step-by-step explanation:
(5x-2y)^2 = 49
25x^2+4y^2 - 20xy = 49
= 49+40
25x^2+4y^2=89
(5x+ 2y)^2 = 25x^2+ 4y^2 + 20xy
= 89+20.2
= 129
Answered by
1
Answer:
The answer will be 129.
Step-by-step explanation:
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