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Help asap please and thanks

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User GMG
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1 Answer

6 votes


-(2)/(3)(2x - (1)/(2)) \leq (1)/(5)x - 1


-(4x)/(3) + (1)/(3) \leq (1)/(5)x - 1 distributed =2/3 on left side


-(4x)/(3)(15) + (1)/(3)(15) \leq (1)/(5)x (15) - 1(15)

-20x + 5 ≤ 3x - 15

-3x -3x

-23x + 5 ≤ -15

-5 -5

-23x ≤ -20

x ≥
(20)/(23) divided by a negative so the symbol reversed

******************************************************

2x² + 2 = 3x

2x² - 3x + 2 = 0

2x² - 3x = -2

2(x² -
(3)/(2)x} + __) = -2 + (2)(___)

2(x² -
(3)/(2)x}+(-(3)/(4))^(2)) = -2 +
2(-(3)/(4))^(2)

2(x -
(3)/(4))² = -2 +
2((9)/(16))

2(x -
(3)/(4))² = -2 +
(9)/(8)

2(x -
(3)/(4))² = -2 +
(9)/(8)

2(x -
(3)/(4))² =
-(16)/(8) +
(9)/(8)

2(x -
(3)/(4))² =
-(7)/(8)

(x -
(3)/(4))² =
-(7)/(16)

x -
(3)/(4) = +/-
\sqrt{(-7)/(16) }

x -
(3)/(4) = +/-
(i√(7) )/(4)

x =
(3)/(4) +
(i√(7) )/(4), x =
(3)/(4) -
(i√(7) )/(4)

x =
(3 + i√(7) )/(4), x =
(3 - i√(7) )/(4)

User Martin Wittemann
by
5.6k points