Beatapilaviz
Rozwiązane

a) (x+1)(8x-3) = (4x - 3)(2x+1)
b) 4(x+6) - ( 4x kwadrat + 6) = (3-0,5)(8x-2)

Odpowiedź :

Bcdjkmeviz

Odpowiedź:

a) (x+1)(8x-3) = (4x - 3)(2x+1)

8x²-3x+8x-3=8x²+4x-6x-3

8x²-8x²-3x+8x-4x+6x=-3+3

7x=0   /:7

x=0

b) 4(x+6)-(4x²+6)=(3-0,5x)(8x-2)

4x+24-4x²-6=24x-6-4x²+x

-4x²+4x²+4x-24x-x=-6-24+6

-21x=-24  /:(-21)

x=24/21

x=8/7

Catta1eyaviz

[tex]a)\\\\(x+1)(8x-3)=(4x-3)(2x+1)\\8x^2-3x+8x-3=8x^2+4x-6x-3\\5x-3=-2x-3\\7x=0\\x=0[/tex]

[tex]b)\\\\4(x+6)-(4x^2+6)=(3-0.5x)(8x-2)\\4x+24-4x^2-6=24x-6-4x^2+x\\-4x^2+4x+18=-4x^2+25x-6\\4x-25x=-6-18\\-21x=-24 /:(-21)\\x=\frac87[/tex]

Viz Inne Pytanie