<u>w</u><u>=</u><u>-</u><u>1</u><u>.</u><u>5</u>
<u>w</u><u>=</u><u>2</u>
Answer:
Solution given:
![\sqrt{2w²-19w+31}+2=7-2w](https://tex.z-dn.net/?f=%5Csqrt%7B2w%C2%B2-19w%2B31%7D%2B2%3D7-2w)
again
keep square root alone
![\sqrt{2w²-19w+31}=7-2w-2](https://tex.z-dn.net/?f=%5Csqrt%7B2w%C2%B2-19w%2B31%7D%3D7-2w-2)
solve subtraction of 7-2
![\sqrt{2w²-19w+31}=5-2w](https://tex.z-dn.net/?f=%5Csqrt%7B2w%C2%B2-19w%2B31%7D%3D5-2w)
Squaring on both side
![(\sqrt{2w²-19w+31})²=(5-2w)²](https://tex.z-dn.net/?f=%28%5Csqrt%7B2w%C2%B2-19w%2B31%7D%29%C2%B2%3D%285-2w%29%C2%B2)
2w²-19w+31=5²-2*5*2w+4w²
take terms one side
2w²-19w+31-25+20w-4w²=0
-2w²+w+6=0
2w²-w-6=0
doing middle term factorisation
2w²-(4-3)w-6=0
2w²-4w+3w-6=0
take common from each two term
2w(w-2)+3(w-2)=0
(w-2)(2w+3)=0
either
w=2
or
W=-3/2=-1.5
Answer:
280
Step-by-step explanation:
D = kt
105 = 3k
k = 35
D = 35t
D = 35(8) = 280
Answer:
science E-notation: 8.900e-10
Engineering Notation: 890.0x-12
real number: 8.9E-10
-.-
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
Answer:
The first one is 1/2
The second one is 1
The third one is 0
Step-by-step explanation: