Question

(x+1)²-3(x+7)=3+(x-2)²
(3x-1)²-5(x+2)(x-2)=(2x+3)²+6
(x+2)²/6-(x-2)²/5=4x+7/15-(x-2)(x+2)-5/30

Answer 1

1.  x² + 2x +1 - 3x - 21 = 3+ x² - 4x + 4
3x = 27  x = 9
2.  9x² - 6x + 1 - 5x² + 20 = 4x² +12x + 9 + 6
18x = 6    x = 1/3
3.  (x² +4x +4)/6 - (x² - 4x +4)/5  = (4x + 7)/15 - (x² -4 -5)/30
5x² + 20x +20 - 6x² + 24x - 24 = 8x + 14 - x² + 9
40x = 27  x = 27/40......cred ca nu ecuatia nu e scrisa  corect sau eu nu am inteles-o