<span>2x^2 - 2x - 1 = 0 a = 2, b = -2, c = -1 b^2 - 4ac = (-2)^2 - 4(2)(-1) = 4 + 8 = 12
so the answer is 12
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Answer:
Step-by-step explanation:
given: 1 1/4 - 2/9
= 5/4 -2/9
= 45/36 - 8/36
= 37/36
= 1 1/37
Answer:
x ≈ 9.5
Step-by-step explanation:
using the cosine ratio in the right triangle
cos19° = = ( multiply both sides by 10 )
10 × cos19° = x , then
x ≈ 9.5 ( to the nearest tenth )
Answer:
-7
Step-by-step explanation: When a= 5, let's substitute all a's with 5 in the expression:
Answer:
This is a very hard problem but after weeks of doing it i got 3
Step-by-step explanation: