I rounded 9.27 repeating to 9.28 to make it easier to solve. It would be 232/25 as an improper fraction and 9 and 7/25 as a mixed number.
Degree is exponent, so 5th degree
difference of 2 perfect squares
a^2-b^2=(a-b)(a+b)
t^2-5^2=(t-5)(t+5)
2nd one
complete square
take 1/2 of linear coefient and square it
-6/2=-3, (-3)^2=9
add that to both sides
x^2-6x+9=-8+9
x^2-6x+9=1
factor
(x-3)^2=1
sqrt
take neg and pos root
x-3=+/-1
add 3
x=3+/-1
x=3+1 or x=3-1
x=4 or 2
3rd option
Answer:
= − 3
Step-by-step explanation:
15−2x=−7x
− 2 + 15 = −7
−2+15−15=−7−15
−2=−7−15
so 1 . you rearrange the terms
2. subtract 15 from both sides
3 simpfly subtract the number
With a line parallel to a side through a triangle we get similar triangles so a proportion.
AC : BC = AQ : PQ
AC = BC AQ / PQ
AC = 12.6 (7.2) / 8.4
AC = 10.8 cm
Answer: 10.8 cm