Question

$the value of 25x^2 + 40xy a + x = 18y = - 1is$
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Answer 1

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Answer 2

Answer:

1 is your answer.

Step-by-step explanation:

The value of 25x² +16y² +40xy at x=1 and y=−1 is

25(1)² +16(−1)² +40(1)(−1)

⇒25+16−40

⇒1

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