Simplify the expression and find its value when x = –3 and y = +5:
2(x2 + 2xy) + 5 – xy + y2
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2(x2 + 2xy) + 5 – xy + y2
2 x - 3 x 2 + 2 x - 3 + 5 + 5 x - (- 3 + 5) x + (+ 5 x 2)
2 x - 3 x 2 + 2 x - 3 + 5 + 5 x + 3 + 5 x + 5 x 2
- 6 x 2 + (- 6) + 5 + 15 + 25 x 2
- 12 - 6 + 5 + 15 + 50
- 12 - 1 + 65
- 12 + 64
= 52
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