If A = x2
+5x+1 and B = x2
-2x2
+7x+9 find 2A-B.
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Answer:
A=x²+5x+1
and b= x²-2×2+7x+9
Solving
a=x²+x+5
b=x²-4+7x+9
x²+7x+5
NOW 2×(x²+5x+1)-(x²+7x+5)
2x²+10x+2-x²-7x-5
x²+3x-3
ANSWER IS X²+3X-3
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