find the value of 25x^2 + 16y^2 + 40 xy at x=1 and y=-1.
Answers
Answered by
0
Answer:
-31
Step-by-step explanation:
(25×1) + (16×(-1)) + 40×1×(-1)
25-16-40
25-56
-31
Answered by
1
Answer:
1
Step-by-step explanation:
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