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Cheyanne Blevins
Mathematics
20 January, 19:24
Simplify the expression:
(-2-2i) (-4+6i)
+5
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Ruben Zuniga
20 January, 19:33
0
(-2-2i) (-4+6i)
=8-12i+8i-12i^2
=8-4i-12i^2
=4 (2-i-3i^2)
=4 ((i-1) (3i+2))
=4 (i-1) (3i+2)
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Sonny Lam
20 January, 19:43
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Answer: (-2-2i) (-4+6i) = 20 - 4i
Step-by-step explanation:
We have the expression:
(-2 - 2i) * (-4 + 6i)
the rule we need to know here is that i*i = - 1
now, the first step is distribute the parentheses.
(-2 - 2i) * (-4 + 6i) = - 2*-4 - 2*6i - 2i*-4 - 2i*6i = 8 - 12i + 8i - 12 * (i*i)
= 8 + (8 - 12) i + 12 = 20 - 4i
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