Question

с 395 по 404 плиииззз

Answer 1

$x^2-10x=0 \ x(x-10)=0 \ x=0 \ x=10$

 

$x^2+6x=0 \ x(x+6)=0 \ x=0 \ x=-6$

 

$4x^2+20x=0 \ x^2+5x=0 \ x(x+5)=0 \ x=0 \ x=-5$

 

$3x^2-12x=0 \ x^2-4x=0 \ x(x-4)=0 \ x=0 \ x=4$

 

$2x^2+x=0 \ x(2x+1)=0 \ x=0 \ x=-0.5$

 

$4x^2-x=0 \ x(4x-1)=0 \ x=0 \ x=0.25$

 

$3x^2-27=0 \ x^2-9=0 \ (x-3)(x+3)=0 \ x=3 \ x=-3$

 

$2x^2-32=0 \ x^2-16=0 \ (x-4)(x+4)=0 \ x=4 \ x=-4$

 

$4x^2+20x=0 \ x^2+5x=0 \ x(x+5)=0 \ x=0 \ x=-5$

 

$3x^2-12x=0 \ x^2-4x=0 \ x(x-4)=0 \ x=0 \ x=4$

Answer 2

395

x^2-10x=0

x(x-10)=0

x=0        x=10

 

396

x^2+6x=0

x(x+6)=0

x=0

x=-6

 

397

4x^2+20x=0

4x(x+5)=0

x=0

x=-5

 

398

3x^2-12x=0

3x(x-4)=0

x=0

x=4

 

399

2x^2+x=0

x(2x+1)=0

x=0

x=-0.5

 

400

4x^2-x=0

x(4x-1)=0

x=0

x=0.25

 

401

3x^2-27=0

3x^2=27

x^2=9

x=3

x=-3

 

402

2x^2-32=0

2x^2=32

x^2=16

x=4

x=-4

 

403

4x^2+20x=0

4x(x+5)=0

x=0

x=-5

 

404

3x^2-12x=0

3x(x-4)=0

x=0

x=4