1) (+5e)^2=9b^2+10be+e^2) (-12+7b)^2=144+168b+49b^3) (-11t-4b)^2=121t^2+88tb+16b^4) -(2t+1/4)^2 = -(4t^2+1/2t+1/165) (x+y)^2-x(x+2y) = x^2+2xy+y^2-x^2-2xy = y^6) (x-y)^2+x(2y-x) = x^2-2xy+y^2+2xy-x^2 = y^2
1) (+5e)^2=9b^2+10be+e^
2) (-12+7b)^2=144+168b+49b^
3) (-11t-4b)^2=121t^2+88tb+16b^
4) -(2t+1/4)^2 = -(4t^2+1/2t+1/16
5) (x+y)^2-x(x+2y) = x^2+2xy+y^2-x^2-2xy = y^
6) (x-y)^2+x(2y-x) = x^2-2xy+y^2+2xy-x^2 = y^2