show step by step:
(x2+ 6x - 4) - ( x2 + 6x -4)
Answer:
"(x^2+ 6x - 4) - ( x^2 + 6x -4)=x^2+ 6x - 4 - x^2 - 6x +4=0;"
step 1 : "x^2+ 6x - 4 - x^2 -6x +4" (open the brackets);
step 2: "\\cancel{x^2}+ \\cancel{6x} - \\cancel{4} - \\cancel{x^2} -\\cancel{6x} +\\cancel{4}" (we cancel the same terms with opposite signs);
step 3: 0 (we get the result).
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