(x+2)(x+3)(x+8)(x+12)=4x^2

Question

(x+2)(x+3)(x+8)(x+12)=4x^2

Answer 1

(x^2+3x+2x+6)(x^2+12x+8x+96)=4x^2;
(x^2+5x+6)(x^2+20x+96)=4x^2;
x^4+20x^3+96x^2+5x^3+100x^2+480x+6x^2+120x+576=4x^2;
x^4+25x^3+202x^2+600x+576=0;
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