( 2x+ 5)(3x - 7) + (2x - 1)(2x + 1) = (5x + 3)(2x - 5)
6x^2 + x - 35 + 4x^2 - 1 = 10x^2 - 19x - 15
10x^2 + x - 36 = 10x^2 - 19x - 15
10x^2 - 10x^2 + x + 19x = - 15 + 36
20x = 21
x = 21/20
x = 1,05
1) y'= 3^x * ln3 -2
2)y'=5^6x-1 * ln5*(6x-1)' +e^3x * (3x)' = 5^6x-1 * 6ln5 + 3e^3x
<span>3)y=log3*(x^2+2x+4)
y'= 1/[(x</span>²+2x+4)*ln3] *(2x+2)
<span>
4)y=ln*(x^2-3x)+cos3x
y'= 1/(x</span><span>²-3x) * (2x-3) -sin3x * 3</span>
18^1-n*3^n+1/6^-n=6*3^1-n*3^n+1/6^-n=54/6^-n=9^-n
1) 2х-14х+9х = 14+19
-3х = 33 |: (-3)
х= -11
2) 6х + 5х +х = 4-10+8+7
12х = 9
х = 9/12
x = 3/4 = 0.75
3) -х - 5х + 8х +2х = 2 - 9 + 7
4х = 0
х = 0
4) -4х - 2х +х = -5-18-7
-5х = -30
х = 6
5) -7х +2 х - 3х = 2+8+5-3
-8х = 12
4х = -6
2x= -3
x = -3/2 = -1.5