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RSB [31]
2 years ago
5

How would I solve (-2-2i)(-4-3i)(7+8i)

Mathematics
2 answers:
AlexFokin [52]2 years ago
8 0
(-2-2i)(-4-3i)(7+8i)= \\\\ =(8+6i+8i+6i^2)(7+8i)=\\\\ =(6i^2+14i+8)(7+8i)= \\\\ =42i^2+98i+56+48i^3+112^2+64i= \\\\ =\boxed{48i^3+154i^2+162i+56}
grin007 [14]2 years ago
3 0
(-2-2i)(-4-3i)(7+8i)=\\
(-2-2i)(-28-32i-21i+24)=\\
(-2-2i)(-4-53i)=\\
8+106i+8i-106=\\
-98+114i

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3 0
2 years ago
An item that was selling for $72.00 was reduced to $60.00. Find the percent decrease in price. Show all your work.
dsp73
The formula to figure out the percentage increase or decrease is: 
<span>(new - old) / old * 100% </span>

<span>new = 60 </span>
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8 0
3 years ago
What is 2x - 3 = -x + 3
BARSIC [14]
<span>Simplifying 2x + -3 = -1x + 3
 Reorder the terms: -3 + 2x = -1x + 3
 Reorder the terms: -3 + 2x = 3 + -1x Solving -3 + 2x = 3 + -1x
 Solving for variable 'x'.
 Move all terms containing x to the left, all other terms to the right. Add 'x' to each side  of the equation. -3 + 2x + x = 3 + -1x + x
 Combine like terms: 2x + x = 3x -3 + 3x = 3 + -1x + x
 Combine like terms: -1x + x = 0 -3 + 3x = 3 + 0 -3 + 3x = 3
 Add '3' to each side of the equation. -3 + 3 + 3x = 3 + 3
 Combine like terms: -3 + 3 = 0 0 + 3x = 3 + 3 3x = 3 + 3
 Combine like terms: 3 + 3 = 6 3x = 6
 Divide each side by '3'. x = 2
 Simplifying x = 2

answer x=2

Hope I Helped:D</span>
7 0
3 years ago
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