So the answer is (<span>x^2 plus or minus 6)(x^2 plus or minus 6) an easy way to do this is to only look at plus or minus 6 x^4 <u><em>- 12</em></u>x^2 + <u><em>36 (-12 and 36) </em></u><em /> <u><em /></u>6 x 6 = 36 <em />6 + 6 </span>≠ -12 (x^2 + 6)(x^2 + 6) is incorrect <span><u><em> </em></u><em><u /></em><u />6 x -6 </span>≠ 36 <span><em />6 + -6 </span>≠ -12 (x^2 - 6)(x^2 + 6) is incorrect <span><em /><em> </em><em />-6 x -6 = 36 <em />-6 + -6 = -12 </span><span>(x^2 - 6)(x^2 - 6) is correct </span><u><em> the answer is (1)