Answer:
Positive
Step-by-step explanation:
Looking for - r/2
Having that negative in front is basically saying
-1 * r/2
Based on where r is it is negative.
-1 × -r thus making the answer going to be positive due to negative × negative = positive
3) x² - 121 = 0
x² = 121
x' = +√121
x' = 11
_______________
x'' = - √121
x'' = -11
Solution ⇒ S{-11 ; 11 } or (x-11)(x+11)
4) 4x² + 144 = 0
4x² = -144
x² = -144 / 4
x² = -36
x = √-36
No solution ⇒ S = ∅
5) z²+10z+21 = 0
Δ = 10² - 4(1)(21)
Δ = 100 - 84
Δ = 16
x' = (-10+4) / 2 = -6/2 = -3
x'' = (-10-4) / 2 = -14/2 = -7
Solution ⇒ S{ -7 ; -3} or (x+3)(x+7)
Answer:
12x6+2(6-1)
72+2x5
72+10
82
82 is the answer.
Step-by-step explanation:
Just replace the X's in the problem with 6.
Step-by-step explanation:
Given
11x - 6 = 3 - 10x
11x + 10x = 3 + 6
21x = 9
x = 9/ 21 (divide both numerator and denominator by 3)
x = 3 / 7
Hope it helps :)
Answer:
a = 22
AB = 50
Step-by-step explanation:
Line AB=2a+6
Hope this helps
