Question

(5x+1)(2x-3)=(10x-3)(x+1)

Answer 1

10x^2-15x+2x-3=10x^2+10x-3x-3
2-15x+2x-3=10x-3x-3
-15x+2x-10x+3x=-2+3-3
-23x=2
X=-23/2

Answer 2

(5x + 1) (2x-3)=(10x-3)(x+1)
10x-15x+2x-3=10x^2+10x-3x+3
-10x^2 +10x-15x+2x-10x+3x=3+3
-10x^2-13x=9
10x^2+13x+9=0
D=13^2+4*10*9=169+360=$sqrt{529}$
D=23
x1 = 0,5
x2 = $- frac{36}{20}$
x2 не підходить 
В: 0,5