49x2+74x+25=049 x^{2}+74 x+25=049x2+74x+25=0
49x2−74x−25=049 x^{2}-74 x-25=049x2−74x−25=0
49x2−74x+25=049 x^{2}-74 x+25=049x2−74x+25=0
−49x2+74x+25=0-49 x^{2}+74 x+25=0−49x2+74x+25=0