x^2+5x-3=0
x1,2=(-5+-/sqrt5^2-4*2*(-3))/2*2=(-5+-/sqrt49)/4=(-5+-7)/4
x1=(-5+7)/4=0.5
x2=(-5-7)/4=-3
2x^2+5x-3=2*(x-0.5)*(x+3)=(2x-1)*(x+3)
а) x * |x| +2* |x| -6-3x=0
|x|(х +2) -3(2 - x)=0
(|x| - 3)(х +2) = 0
|x| = 3 => х = +/- 3
х = -2
б) x * 5^x + 3 * 5^x -5x - 15=0
5^x(x+3) - 5(x+3) = 0
(x+3)(5^x - 5) = 0
x=-3
5^x - 5 = 0
5^x = 5^1
x=1
x^2+5x-3=0
x1,2=(-5+-/sqrt5^2-4*2*(-3))/2*2=(-5+-/sqrt49)/4=(-5+-7)/4
x1=(-5+7)/4=0.5
x2=(-5-7)/4=-3
2x^2+5x-3=2*(x-0.5)*(x+3)=(2x-1)*(x+3)
а) x * |x| +2* |x| -6-3x=0
|x|(х +2) -3(2 - x)=0
(|x| - 3)(х +2) = 0
|x| = 3 => х = +/- 3
х = -2
б) x * 5^x + 3 * 5^x -5x - 15=0
5^x(x+3) - 5(x+3) = 0
(x+3)(5^x - 5) = 0
x=-3
5^x - 5 = 0
5^x = 5^1
x=1