4 a⁴ - 2 b² + 40 :
4 * ( 2⁴) - 2 * ( 7²) + 40 =
4 * 16 - 2 * 49 + 40 =
64 - 98 + 40 =
-34 + 40 =
+ 6
<span>hope this helps!</span>
It will be right angle triangle. The two vectors beginning at the same vertex
of a triangle are <2,3> and <-3,2> is classified as right-angled
triangle. It is classified as a right-angled triangle because the dot product
of the vectors are 0.
Answer:
JUST DOING THIS FOR POINTS
Step-by-step explanation:
LOL
Answer: sally initially has $240, Tom initially has $180.
Step-by-step explanation:
Let initial amount of money sally has = x
Then, initial amount tom has = 75% * x = 0.75x
Now to present,
Amount sally has = x -120
Amount tom has = [x - 120] + [50% * (x-120)]
= x - 120 + 0.5x - 180
= 1.5x - 180
Since Tom didn't spend, it means this is the same amount tom has then we equate both equations.
0.75x = 1.5x - 180
180 = 0.75x
x = 240
Therefore, initial money of sally of sally = $240
Initial money of tom = 240 * 0.75 = $180.
Answer:
![x^{4} -18x^{3}+104x^{2} -172x-100](https://tex.z-dn.net/?f=x%5E%7B4%7D%20-18x%5E%7B3%7D%2B104x%5E%7B2%7D%20-172x-100)
Step-by-step explanation:
The 3 roots are given out of which 2 are real and 1 is imaginary. For a polynomial of least degree having real coefficients, it must have a complex conjugate root as the 4th root. Therefore, based on 4 roots, the least degree of polynomial will be 4. Finding the polynomial having leading coefficient=1 and solving it based on multiplication of 2 quadratic polynomials, we get:
![\\\\x_{1} = 2-\sqrt{6} \\x_{2} = 2+\sqrt{6} \\x_{3}=7-i \\x_{4}=7+i \\\\P(x)=1(x-x_{1})(x-x_{2} )(x-x_{3} )(x-x_{4} ) \\\\=(x-(2-\sqrt{6}))( x-(2+\sqrt{6} )) (x-(7-i))( x-(7+i))\\=((x-2)+\sqrt{6})( ( x-2)-\sqrt{6} ) ((x-7)+i)( (x-7)-i)\\=((x-2)^{2} -(\sqrt{6} )^{2} )((x-7)^{2}-(i)^{2})\\=(x^{2} -4x-2)(x^{2} -14x+50)\\=x^{4} -18x^{3}+104x^{2} -172x-100\\](https://tex.z-dn.net/?f=%5C%5C%5C%5Cx_%7B1%7D%20%3D%202-%5Csqrt%7B6%7D%20%5C%5Cx_%7B2%7D%20%3D%202%2B%5Csqrt%7B6%7D%20%5C%5Cx_%7B3%7D%3D7-i%20%5C%5Cx_%7B4%7D%3D7%2Bi%20%5C%5C%5C%5CP%28x%29%3D1%28x-x_%7B1%7D%29%28x-x_%7B2%7D%20%29%28x-x_%7B3%7D%20%29%28x-x_%7B4%7D%20%29%20%5C%5C%5C%5C%3D%28x-%282-%5Csqrt%7B6%7D%29%29%28%20%20x-%282%2B%5Csqrt%7B6%7D%20%29%29%20%28x-%287-i%29%29%28%20x-%287%2Bi%29%29%5C%5C%3D%28%28x-2%29%2B%5Csqrt%7B6%7D%29%28%20%28%20x-2%29-%5Csqrt%7B6%7D%20%29%20%28%28x-7%29%2Bi%29%28%20%28x-7%29-i%29%5C%5C%3D%28%28x-2%29%5E%7B2%7D%20-%28%5Csqrt%7B6%7D%20%29%5E%7B2%7D%20%29%28%28x-7%29%5E%7B2%7D-%28i%29%5E%7B2%7D%29%5C%5C%3D%28x%5E%7B2%7D%20-4x-2%29%28x%5E%7B2%7D%20-14x%2B50%29%5C%5C%3Dx%5E%7B4%7D%20-18x%5E%7B3%7D%2B104x%5E%7B2%7D%20-172x-100%5C%5C)