Question

1) x² - 8x + 16 = 0

2) x² + 2x - 1 = 0

3) x² - 10x + 25 = 0

4) x² - 4x +4 = 0

5) -x² + 6x +9 = 0

6) x² + 36 = 12x

7) x² = -20x -100


8) 14x = -49 – x²

9) 4x² +6x+ 25/4 = x + 3x²

10) (x + 3)² = 1

Answer 1

Resposta:

1x² +8x+16=0 (-4)²+8.(-4)+16=0 16-32+16=0 -16+16=0

0=0

2) x²-2x+1=0 a= 1 b= -2 c= 1 A=b²-4ac A=(-2)2-4-1-1 A=4-4 A=0

3) -b+√A 2a -b-√A 2a x' -10 2 -5

4) x= -b +ou- √A/ 2.a x=-(-4) +ou- √0/2.1 x= 4 +ou- 0/2 x=4/2 x=2

5) 2x² - 6x + 9 = 0 a = 2, b = -6, c = 9 A = b² - 4ac A=(-6)²-4 2.9 A = 36-72 A = -36

6) v =ze/36 = 6 2 x 6 = 12x.

7) essa eu não sei

8) 14,0

10) (x + 3)² = 1 x² + 6x + 9 -1 = 0 x² + 6x + 8 = 0 delta---> 36 - 32 = 4 Vdelta---> V4 = 2 x'= (-6+2)/2 = -2 x"= (-6-2)/2 = -4