Question

ROZWIĄŻ RÓWNANIA :
1) (x+2)₂=x²
2) (2-3x)₂ - (1+2x)² - 3x² = 2x²
3) (x+2)²= x² - 2
4) y(2y-1) = 2(2 + y)²

Answer 1

1) (x+2)₂=x²
x²+4x+4=x²
4x=-4/:4
x=-1
2) (2-3x)₂ - (1+2x)² - 3x² = 2x²
4-12x+9x²-(1+4x+4x²)-3x²=2x²
4-12x+9x²-1-4x-4x²-3x²=2x²
-12x+9x²-4x-4x²-3x²-2x²=-4+1
-16x=-3/;(-16)
x=3/16
x=0.1875
3) (x+2)²= x² - 2
x²+4x+4=x²-2
4x=-4-2
4x=-6/:4
x=-6/4
x=-1i 1/2
4) y(2y-1) = 2(2 + y)²
2y²-y=2(4+4y+y²)
2y²-y=8+8y+2y²
-9y=8/:(-9)
y=-0.888888888888

Mam nadzieję że pomogłam :)

Answer 2

1) (x+2)₂=x²
(x+2)² = x²
x²+4x+4 = x²
x²-x²+4x = -4
4x = -4 |:4
x = -1

2) (2-3x)²-(1+2x)²-3x²= 2x²
4-12x+9x²-(1+4x+4x²)-3x² = 2x²
4-12x+9x²-1-4x-4x²-3x² = 2x²
9x²-4x²-3x²-2x²-12x-4x = 1-4
-16x = -3 |:(-16)
x = 3/16

3) (x+2)²= x² - 2
x²+4x+4 = x²-2
x²-x²+4x = -2-4
4x = -6 |:4
x = -6/4
x = -3/2

4) y(2y-1) = 2(2 + y)²
2y²-y = 2(4+4y+y²)
2y²-y = 8+8y+2y²
2y²-2y²-y-8y = 8
-9y = 8 |:(-9)
y = -8/9