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Georgia [21]
2 years ago
12

7. Write the sum of (12 + 1) - (18+51) in the form a + bi.

Mathematics
1 answer:
tresset_1 [31]2 years ago
4 0
I’m assuming the 1’s are the i’s.
=12+i-18+5i
=-6+6i
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Note:xy means x times y and x(y) means the same thing

so
first we get rid of square root then
make the equation equal to zero becaues if
xy=0 then x or/and y=0



squareroot(y-1)+3=y

isolate the squareroot
subtrac 3 from boht sides

squareroot(y-1)=y-3

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subtrac y from both sides
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add 1 to both sides
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0=(y-5)(y-2)
therfore
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and/or
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let's try out 2
square root(2-1)+3=2
square root(1)+3=2
1+3=2
false
so 2 doesn't work



let's try 5
squareroot(5-1)+3=5
squareroot(4)+3=5
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5=5
true

y=5
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