Answer:
1. 1/2 +/-√5
2. 1 +/- i √6/2.
Step-by-step explanation:
1. f(x) = 4x^2 - 8x - 1
x = [-(-8) +/-√((-8)^2 - 4*4*-1)] / (2*4)
x =[ 8 +/- √80] / 8
= 1 +/- 4√5/8
= 1 +/- √5/2
= 1/2 +/-√5
2. By a similar method the zeros of the the second equation are:
x = [-(-4) +/- √((-4)^2 - 4*2*5)] / 4
= 4 +/- √(16 - 40) / 4
= 1 +/- √(-24)/4
= 1 +/- i √6 * 2 / 4
= 1 +/- i √6/2.
Answer:
x = 1
Step-by-step explanation:
11 = 7 + 4x
Subtract 7 from both sides
11-7 = 7-7 + 4x
4 = 4x
Divide 4 from both sides
4/4 = 4x/4
1 = x
x = 1
Check:
11 = 7 +4(1)
11 = 7+4
11 = 11
Hope this helps. Have a nice day.
Answer: Im pretty sure it is the equal sign with the line between it
pretty sure that is it tho
Hope that helped
Step-by-step explanation:
First think out the equation, once you've done that multiply 3 by 25 to get 75
Answer: 24/35
Step-by-step explanation:
3/5 * 8/7
3*8/5*7
24/5*7 = 24/35
