intermediate algebra

[hopen2impov]

MULTIPLY

(x+1/2) (x^2 +4x +1/2)= (x^2 +4x +1/2) +(1/2) (x^2 +4x +1/2)
(x+1/2) (x^2 +4x -1/2)= (x^3 +4x^2 +(x/2) + (x^2 +2x +1/4)
(x+1/2) (x^2 +4x +1/2)= x^3+ (4+1/2)* x^2+(2 +1/2) * x +1/4
(x+1/2) (x^2 +4x +1/2)= x^3+ (9/2)* x^2+ (9/2)* x^2+ (5/2) * x +1/4

 

[wjm11]

(x+1/2) (x^2 +4x +1/2)= (x^2 +4x +1/2) +(1/2) (x^2 +4x +1/2)
(x+1/2) (x^2 +4x -1/2)= (x^3 +4x^2 +(x/2) + (x^2 +2x +1/4)
(x+1/2) (x^2 +4x +1/2)= x^3+ (4+1/2)* x^2+(2 +1/2) * x +1/4
(x+1/2) (x^2 +4x +1/2)= x^3+ (9/2)* x^2+ (9/2)* x^2+ (5/2) * x +1/4

You left out a 1/2 in the second line but corrected it in the third.

You wrote (9/2)* x^2 twice in your final answer. It should only appear once.

Be careful.