X^2+16-38=0
find what 2 numbers multiply to get -38 and add to get 16
find factors of 38
2 times 19
there is no way to use common factor so use quadratic formula which is
x=
![\frac{ -b+\sqrt{b^2-4ac} }{2a}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-b%2B%5Csqrt%7Bb%5E2-4ac%7D%20%7D%7B2a%7D%20)
or x=
![\frac{ -b-\sqrt{b^2-4ac} }{2a}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-b-%5Csqrt%7Bb%5E2-4ac%7D%20%7D%7B2a%7D%20)
ax^2+bx+c=0 subsitte
a=1
b=16
c=-38
subsitute
![\frac{ -16+\sqrt{16^2-4(1)(-38)} }{2(1)}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-16%2B%5Csqrt%7B16%5E2-4%281%29%28-38%29%7D%20%7D%7B2%281%29%7D%20)
=
![\frac{ -16+\sqrt{256+152} }{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-16%2B%5Csqrt%7B256%2B152%7D%20%7D%7B2%7D%20)
=
![\frac{ -16+\sqrt{408} }{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-16%2B%5Csqrt%7B408%7D%20%7D%7B2%7D%20)
=
![\frac{ -16+2\sqrt{102} }{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-16%2B2%5Csqrt%7B102%7D%20%7D%7B2%7D%20)
=
![-8+\sqrt{102}](https://tex.z-dn.net/?f=-8%2B%5Csqrt%7B102%7D%20)
so the answers for x are
![-8+\sqrt{102}](https://tex.z-dn.net/?f=-8%2B%5Csqrt%7B102%7D%20)
and
![-8-\sqrt{102}](https://tex.z-dn.net/?f=-8-%5Csqrt%7B102%7D%20)
which are aprox -2.099504938362 and +18.099504938362
so it would be
(x-[-8+√102])(x+[8+√102])=0
Answer:
x = 2
Step-by-step explanation:
![log \: {x}^{3} + log \: 5x = 5log \: 2 - log \: \frac{2}{5} \\ \\ \therefore \: log( {x}^{3} \times 5x) = log {2}^{5} - log \: \frac{2}{5} \\ \\ \therefore \: log( 5{x}^{4}) = log 32 - log \: \frac{2}{5} \\ \\ \therefore \: log( 5{x}^{4}) = log \bigg(32 \times \frac{5}{2} \bigg) \\ \\ \therefore \: log( 5{x}^{4}) = log \bigg(16 \times 5) \\ \\ \therefore \: 5{x}^{4}= 16 \times 5 \\ \\ \therefore \: {x}^{4}= {2}^{4} \\ \\ \huge \purple{ \boxed{\therefore \: {x} = 2}}](https://tex.z-dn.net/?f=log%20%20%5C%3A%20%7Bx%7D%5E%7B3%7D%20%20%2B%20log%20%5C%3A%205x%20%3D%205log%20%5C%3A%202%20-%20log%20%5C%3A%20%20%5Cfrac%7B2%7D%7B5%7D%20%20%5C%5C%20%20%5C%5C%20%20%5Ctherefore%20%5C%3A%20log%28%20%7Bx%7D%5E%7B3%7D%20%20%5Ctimes%205x%29%20%3D%20log%20%20%7B2%7D%5E%7B5%7D%20-%20log%20%5C%3A%20%20%5Cfrac%7B2%7D%7B5%7D%20%20%5C%5C%20%20%5C%5C%20%5Ctherefore%20%5C%3A%20log%28%205%7Bx%7D%5E%7B4%7D%29%20%3D%20log%2032%20-%20log%20%5C%3A%20%20%5Cfrac%7B2%7D%7B5%7D%20%5C%5C%20%20%5C%5C%20%5Ctherefore%20%5C%3A%20log%28%205%7Bx%7D%5E%7B4%7D%29%20%3D%20log%20%20%5Cbigg%2832%20%20%5Ctimes%20%20%5Cfrac%7B5%7D%7B2%7D%20%20%5Cbigg%29%20%5C%5C%20%20%5C%5C%20%5Ctherefore%20%5C%3A%20log%28%205%7Bx%7D%5E%7B4%7D%29%20%3D%20log%20%20%5Cbigg%2816%20%20%5Ctimes%20%205%29%20%5C%5C%20%20%5C%5C%20%5Ctherefore%20%5C%3A%205%7Bx%7D%5E%7B4%7D%3D%20%2016%20%20%5Ctimes%20%205%20%5C%5C%20%20%5C%5C%20%5Ctherefore%20%5C%3A%20%7Bx%7D%5E%7B4%7D%3D%20%20%20%7B2%7D%5E%7B4%7D%20%20%20%5C%5C%20%20%5C%5C%20%20%5Chuge%20%5Cpurple%7B%20%5Cboxed%7B%5Ctherefore%20%5C%3A%20%7Bx%7D%20%3D%202%7D%7D)
Answer:
I am pretty sure the answer is 3. hope this helps
Answer: 12
Step-by-step explanation:
if there are 2 people then doing the same job then that means divide by two so 8 which is off the 28 , 8 divided by 2 is 4, then, that makes 24 , and 24 divided by 2 is 12 so the answer is 12
Answer:
3
Step-by-step explanation:
The sum of these two polynomials is - 2 x^2 - 3. the two x variables are additive inverses and -6 x^2 and 4 x^2 equal - 2 x^2 and -3 results from -4 and 1
Multiplying the sum by 2 gives us - 4 x^2 - 6 . Answer 3