If x=3−2√2 find x+1x
x+(1x)=3−2√2+(13−2√2)×(3+2√23+2√2)=3−2√2+3+2√2=6
What must be subtracted from x3−3x2+5x−1 to get 2x3+x2−4x+2 ?
Factor of
8x3−27
Multiply the terms −3x2y2, −2xy, 2x2y and verify the product for x=1 and y=2