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snow_lady [41]
4 years ago
12

What multiples to 42 and adds to -2

Mathematics
1 answer:
solniwko [45]4 years ago
4 0

Answer:

Step-by-step explanation:

xy = 42

x+y = - 2                   Substitute into the top equation

y = -2 - x                   Put in for y

x(-2 - x) = 42             Remove the brackets

-2x - x^2 = 42           Subtract 42 from both sides.

-2x - x^2 - 42 = 0      Put in the more normal order.

-x^2 - 2x - 42 = 0      Multiply by -1

x^2 + 2x + 42 = 0

This cannot be factored. It gives complex roots as it is written. I will give you the answer but I kind of doubt the question is correct.

x1 = - 1 + 6.40i

x2 = -1 - 6.40i

Leave a comment if you have a correction.

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Please help me with this.
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Answer:

Angl.(QMT) = 134°

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or, 134° = 7x + 2x -4° +3°

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