3r^2-8r-28=0
Solve with quadratic formula
2 answers:
R = 8 +- sqrt(64-4*3*-28) / 6
r = 8 +- sqrt(64--336) / 6
r = 8 +- sqrt(400) / 6
r = (8 +- 20) / 6
r = 14/3 or -2
(8 plus of minus radical 64 + 216
divided by
6
(8 + or - 16.73320053)/6
You might be interested in
Answer:
<u>120</u>
Step-by-step explanation:
15 ⋅ 8 = 120
Answer:
∠1 = 90°
∠2 = 26°
Step-by-step explanation:
Answer:
Slope is 2
Step-by-step explanation:
(-2, -4) and (2, 4)
Slope:
m=(y2-y1)/(x2-x1)
m=(4+4)/(2+2)
m=8/4
m = 2
-2/3x+3/7=0.5
-2/3x+3/7=5/10
-2/3x+3/7=1/2
-42 x 2x +6 x 3=21
-28x+18=21
-28x=21-18
-28x=3
x=-3/28
