Answer:
x ≈ - 4.12 , x ≈ 0.12
Step-by-step explanation:
Given
2x² + 8x - 1 = 0 ( add 1 to both sides )
2x² + 8x = 1 ← factor out 2 on the left side
2(x² + 4x) = 1
To complete the square
add/ subtract (half the coefficient of the x- term )² to x² + 4x
2(x² + 2(2)x + 4 - 4) = 1, that is
2(x + 2)² - 8 = 1 ( add 8 to both sides )
2(x + 2)² = 9 ( divide both sides by 2 )
(x + 2)² = 
( take the square root of both sides )
x + 2 = ± 
= ± 
= ± 
( subtract 2 from both sides )
x = - 2 ± 1.5
, thus
x = - 2 - 1.5 ≈ - 4.12 ( to 2 dec. places )
x = - 2 + 1.5 ≈ 0.12 ( to 2 dec. places )
F(11) means to replace x in the equation with 11
12(11) + 5
12 x 11 = 132
Now you have 132 + 5 = 137
F(11) = 137
Answer:
0.325
Step-by-step explanation:
13 ÷ 40 = 0.325
Yo, why is your school still going on? :))))
Answer:
(-2,4)
Step-by-step explanation:
Hope this helps!
please give me brainliest!
Answer:
13
Step-by-step explanation:
The triangle we need to find out one of the measurements for has one length of 11, the similar triangle has a length of 22.
22 divided by 2 is 11 there for 26 divided by 2 is 13.
