Rozwiąż równanie :
a) (x+3)² - 1 = x²
b) 2+(x-4)(x+4)=(x-1)²
c) 4x²-(1-2x)²+2x=11
d) 0=4(10-5x)-3(-3x-5)
e) x+1/2 + 2x-3/3 = x+2/4
f) x+2/4 = 2x-3/2
bardzo proszę o pomoc. Z góry dziękuję ;-)
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a) (x+3)² - 1 = x²
x²+6x+9-1-x²=0
6x=-8 :6
x=- 1 1/3
b) 2+(x-4)(x+4)=(x-1)²
2+x²-16=x²-2x+1
2x=15 /:2
x= 7 1/2
c) 4x²-(1-2x)²+2x=11
4x²-1+4x-4x²+2x=11
6x=12 /:6
x=2
d) 0=4(10-5x)-3(-3x-5)
0=40-20x+9x+15
11x=55 /:11
x=5
e) (x+1)/2 + (2x-3)/3 = (x+2)/4 /*12
6(x+1)+4(2x-3)=3(x+2)
6x+6+8x-12=3x+6
11x=12 /:11
x= 1 1/11
f) (x+2)/4 = (2x-3)/2 /*4
x+2=2(2x-3)
x=4x-6-2
-3x=-8 /:(-3)
x= 2 2/3