if x+y =8 and x-y =2, find the value of 2x²+2y²
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Answered by
4
Answer:
68
Step-by-step explanation:
By elimination method,
2x=10→ x=5
and y=3
The value of 2x²+2y²=2(5)²+2(3)²
=2(25)+2(9)
=50+18=68
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