Zadanie z matematyki chodzi o równania
a) 3x+(6x+1)² = 4(5+9x²)-4
b) (3x+2)² = 3(3x² -7)+1
c) (-3+6)² -2 = 3x(3x - 11)+31
d) (-6x+2)² - 7 = -3(4 - 12x²+2x)
e) (3x+2)² = 3(3x²+5)+1
f) (3x-4)² = (3x-2)²
g) (½x - 2)²+ 2x = 0,25x(x - 8)
h) (x-1)²= x²
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a) 3x+(6x+1)² = 4(5+9x²)-4
3x + 36x^2 + 12x + 1 = 20 + 36x^2 - 4
15x + 1 = 16
15x = 15
x = 1
b) (3x+2)² = 3(3x² -7)+1
9x^2 + 12x + 4 = 9x^2 - 21 + 1
12x = 16
x = 1 i 1/3
c) (-3+6)² -2 = 3x(3x - 11)+31 - przypuszam że ma być -3x jeśli nie to poprawie
9x^2 - 36x + 36 - 2 = 9x^2 - 33x + 31
-3x = 31 - 34
-3x = -3
x = 1
d) (-6x+2)² - 7 = -3(4 - 12x²+2x)
36x^2 - 24x +4 - 7 = -12 +36x^2 - 6x
-18x = -12 +7 - 4
-18x = -9
x = 1/2
e) (3x+2)² = 3(3x²+5)+1
9x^2 + 12x +4 = 9x^2 + 15 + 1
12x = 16 - 4
12x = 12
x = 1
f) (3x-4)² = (3x-2)²
9x^2 - 24x +16 = 9x^2 - 12x + 4
-12x = 4 - 16
-12x = -12
x = 1
g) (½x - 2)²+ 2x = 0,25x(x - 8)
1/4x^2 - 2x +4 + 2x = 1/4x^2 - 2
4 = -2 - sprzeczności, brak rozwiązania
h) (x-1)²= x²
x^2 -2x +1 = x^2
-2x = -1
x = 1/2