X = a + bi
y = c + di
xy = yx
(a + bi)(c + di) = (c + di)(a + bi)
a(c + di) + bi(c + di) = c(a + bi) + di(a + bi)
a(c) + a(di) + bi(c) + bi(di) = c(a) + c(bi) + di(a) + di(bi)
ac + adi + bci + bdi² = ac + bci + adi + bdi²
ac + adi + bci - bd = ac + bci + adi - bd
Answer:
1
Step-by-step explanation:
Answer:
oh its really easy
so for -7 you would just count up but negatives so -7 and -5= -13 :)
Step-by-step explanation:
Answer:
yes, by AAA~
Step-by-step explanation:
to find the missing angles subtract 180 - 125 - 27 = 28
then we have all of the angles and we can see they are congruent
