Subtract the sum of 2x−x2+5 and −4x−3+7x2 from 5.
5−(2x−x2+5−4x−3+7x2)=5−(2x−4x−x2+7x2+5−3)=5−(−2x+6x2+2)=5+2x−6x2−2=−6x2+2x+3=3+2x−6x2
Question 6 (b)
From the sum of 4+3x and 5−4x+2x2, subtract the sum of 3x2−5x and −x2+2x+5.