Question

Rozwiąż równania:

a) (x+5)(x+2)-3(4x-3)=(x-5)²

b) 12-2(x-1)²=4(x-2)-(x-3)(2x-5)

Answer 1

A). xkwadrat+2x+5x+10-(12x-9)=xkwadrat-10x+25
5x-6=0
5x=6
x=6/5
x=1 i jedna piąta

b).12-2(xkwadrat-2x+1)=4x-8-(2xkwadrat-5x-6x+15)
12-2xkwadrat+4x-2=4x-8-2xkwadrat+5x+6x-15
12-2+8-5x-6x+15=0
-11x=-33 /(-11)
x=3

Answer 2

A) x² +2x +5x+10-12x+9=x²-10x+25
x²+2x+5x- 12x -x²+10x=-10-9+25
5x=6 /5
x=6/5


b) 12-2(x²-2x+1)=4x-8-(2x²-5x-6x+15)
12- 2x²+4x-2=4x-8-2x²+5x+6x-15
-2x²+4x-4x+2x²-5x-6x=-12+2-15-8
-11x=-33/11
x=3