Answer:
(1+√7,0),(1−√7,0)
Step-by-step explanation:
You can't factor the expression evenly, so use the quadratic formula.
a = 2
b= -4
c= -12
![\frac{-b+\sqrt{b^{2}-4ac } }{2a}](https://tex.z-dn.net/?f=%5Cfrac%7B-b%2B%5Csqrt%7Bb%5E%7B2%7D-4ac%20%7D%20%7D%7B2a%7D)
![\frac{4+\sqrt{16{}-4(2)(-12)} }{2(2)}](https://tex.z-dn.net/?f=%5Cfrac%7B4%2B%5Csqrt%7B16%7B%7D-4%282%29%28-12%29%7D%20%7D%7B2%282%29%7D)
![\frac{4+\sqrt{16-4(-24)} }{4}](https://tex.z-dn.net/?f=%5Cfrac%7B4%2B%5Csqrt%7B16-4%28-24%29%7D%20%7D%7B4%7D)
![\frac{4+\sqrt{16+96} }{4}](https://tex.z-dn.net/?f=%5Cfrac%7B4%2B%5Csqrt%7B16%2B96%7D%20%7D%7B4%7D)
![\frac{4+\sqrt{112} }{4}](https://tex.z-dn.net/?f=%5Cfrac%7B4%2B%5Csqrt%7B112%7D%20%7D%7B4%7D)
![\sqrt{112} = 4\sqrt{7}](https://tex.z-dn.net/?f=%5Csqrt%7B112%7D%20%3D%204%5Csqrt%7B7%7D)
End result: (1+√7,0),(1−√7,0)
X represent the number of laps Marcy swam, 114x represent the number of times Toni swam.
20 + 0.80(114x) + 15 + 0.85x = 257
20 + 91.2x + 15 + 0.85x = 257
92.05x + 35 = 257
Required equation is 92.05x + 35 = 257
Answer:
Find the product of (√2 + √5) (√7 - √5)
![\rm{\green{Answer \: is:-}}](https://tex.z-dn.net/?f=%5Crm%7B%5Cgreen%7BAnswer%20%5C%3A%20is%3A-%7D%7D)
(3xy^2 4 sqrt 4x^2)
Step-by-step explanation:
<h3>Hope it's helpful to you</h3>
Okay what’s the rest of the question ?