Question

|-3,1|+(-4,5) вычислить -3,5- (-2,7) -5,5 - 2,8

Answer 1

1) |-3,1|+(-4,5)=3,1-4,5=-1,4
2) -3,5-(-2,7)=-3,5+2,7=-0,8
3) -5,5-2,8=-(5,5+2,8)=-8,3

Answer 2

To compute the given expressions, let's break them down step by step:

1. |-3,1| + (-4,5) To find the absolute value of a complex number, you need to compute its magnitude. The magnitude of a complex number (a, b) is given by the formula: √(a^2 + b^2). Here, the complex number is (-3, 1). Magnitude = √((-3)^2 + 1^2) = √(9 + 1) = √10 ≈ 3.1622 (rounded to 4 decimal places).

2. -3,5 - (-2,7) To subtract complex numbers, you need to subtract their real parts and their imaginary parts separately. (-3.5, 0) - (-2.7, 0) = (-3.5 + 2.7, 0) = (-0.8, 0).

3. -5,5 - 2,8 Subtraction of complex numbers: (-5.5, 0) - (2.8, 0) = (-5.5 - 2.8, 0) = (-8.3, 0).

So, the final results are:

1. |-3,1| + (-4,5) ≈ 3.1622
2. -3,5 - (-2,7) = (-0.8, 0)
3. -5,5 - 2,8 = (-8.3, 0)