5x² + 2x — 2 , when x = —2 find algebraic expression
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1
The expression (−3x
2
+5x−2)−2(x
2
−2x−1)
=−3x
2
+5x−2−2x
2
+4x+2
=−5x
2
+9x
Comparing with ax
2
+bx+c, we get
a=−5,b=9
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