Can anyone simplify this (3+4i)(2-i) in the form a+bi.?

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Can anyone simplify this (3+4i)(2-i) in the form a+bi. a and b are real numbers. I just can’t do it. Its so frustrating.

2007-03-21 16:55:01 · 2 answers · asked by Magician 1 in Science & Mathematics ➔ Mathematics

=(3 +4i)*(2-i)
=(3 + 4i)*2 + -i(3+4i)
=6 + 8i - 3i -4i*i
=6 + 5i - 4i*i
now i*i = -1
=6+5i -4(-1)
=6+5i+4
=10+5i

2007-03-21 17:03:13 · answer #1 · answered by Anonymous · 1⤊ 0⤋

the first answer is right

2007-03-22 09:35:23 · answer #2 · answered by piscesgurl310 4 · 0⤊ 0⤋