Прошу, решите примеры на множестве R:

1) x (x+2) - (x-3) (x+3) = 13

2) 4x (x-1) - (2x+5) (2x-5) = 1

3) (x-3) (x+4) - 2 (3x-2) = (x-4) ²

4) (x-5) (x+2) - 3 (4x-3) = (x-5) ²

1) х²+2 х - (х²-9) = 13

х²+2 х-х²+9=13

2 х=4

х = 2

2) 4 х²-4 х-4 х²+25=1

-4 х=-24

х=6

3) х²+х-12-6 х+4=х²-8 х+16

3 х=24

х=8

4) х²-3 х-10-12 х+9=х²-10 х+25

-2 х=26

х = - 13

1) = x²+2x - (x²-9) = 13

x²+2x-x²+9=13

2x+9=13

2x=13-9

2x=4 |:2

x=2

2) = 4x²-4x - (4x²-25) = 1

4x²-4x-4x²+25=1

-4x+25=1

-4x=1-25

-4x=-24 | : - 4

x=6

3) = x²+4x-3x-12-6x+4=x²-8x+16

4x-3x-12-6x+4=-8x+16

-5x+8 = - 8x+16

-5x+8x=16+8

3x=24 | : 3

x=8

4) = x²+2x-5x-10-12x+9=x²-10x+25

2x-5x-10-12x+9=10x+25

-15x-1 = - 10x+25

-15x+10x=25+1

-5x=26 | : - 5

x = - 26 = - 5 1

5 5