3 years ago

Please help 2y+x=-15 y=2x

Mathematics

1 answer:

Eva8 [605]3 years ago

5 0

Answer: x = -3

Step-by-step explanation:

2y + x = -15

y = 2x

2y = 2(2x) = 4x

4x + x = -15

5x = -15

x = -3

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Complex numbers identity:

The complex numbers identity is:

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Square of the sum:

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In this question:

$(x + (3+5i))^2$

$x^2 + 2x(3+5i) + (3+5i)^2$

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