Grade 9 Math

The square roots of -3+4 i are 1+2 i and -1-2 i Two methods to check a solution: Square the roots to check they equal the original complex number i.e. Show: 1+2i 2 = 1+2i 1+2i =-3+4i and -1-2i 2 = -1-2i -1-2i =-3+4i Check by graphing the two simultaneous equations using graphing software. ................
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