3x²− 4x+ 7+?5x²+ x− 2A2x2+5x−9B2x2−3x−9C8x2−3x+5D2x2+5x+5 Step-by-Step Solution? =(5x2+x−2)−(3x2−4x+7)=2x2+5x−9, column by column: 5−3=2,1−(−4)=5,−2−7=−9. Adding the rows gives 8x2−3x+5.Answer: A) 2x2+5x−9