Simplify the following expression and find its value when x=7and y=-2 .
1. 2(x²+xy ) +7- xy
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Answer:
Solution:
Given, x=7. y=-2
Then, 2(x²+xy)+7-xy
=2{(7)²+7×(-2)}+7-7×(-2)
=2{49+(-14)}+7+14
=2×35+7+14
=70+31
=101(Answer)
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