I am stuck on solving the problem below, writing the answers in standard form of a complex number, can you also show how it is worked out, thanks in advance. (-2 + 5i) (i - 4) = (-2 + 5i) (i - 4)
= -2(i) - 2(-4) + 5i(i) + 5i(-4) {used foil method} = -2i + 8 + 5i2- 20i {multiplied through} = 5i2- 22i + 8 {combined like terms} = 5(-1) - 22i + 8 {i2is -1} = -5 - 22i + 8 {multiplied 5 by -1} = 3 - 22i {combined like terms} - Algebra House
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