1) Escreva se a equação é completa ou incompleta: a) 3x² -6x =0 b) x² = 8x -15 2)Determine em cada equação os seus coeficientes: a) 7x² +13x -2 =0 b) x² -25 =0

3)Calcule as raízes da equação: a) x² + x -6 =0 b) x² -64 =0

4) Do quadrado de um número real subtraio o quádruplo desse mesmo número e o resultado é 60. Quais números reais satisfazem essa afirmação?

Bonjour,

1)

je ne sais pas ce que signifie une équation complète ou incomplète.

2)

Les coefficients sont peut-être ceux de ax²+bx+c=0

a)

a=7, b=13,c=2

b)

a=1,b=0,c=-25

3)

a) x²+x-6=0

(x+3)(x-2)=0

Sol={-3,2}

b)

x²-64=0

(x+8)(x-8)=0

sol={-8,8}

4)

Soit x le nombre cherché.

x²-4x=60

x²-4x-60=0

(x-10)(x+6)=0

Sol={10,-6}

Preuve:

si x=10 alors 10²-4*10=100-40=60

si x=-6 alors (-6)²-4*(6)=36+24=60

1. sometimes

2. never true

3. sometimes

step-by-step explanation:

these are pretty self explanatory if you know what supp right and com angles are

"image"

step-by-step explanation:

in most of these problems, the notation is that the point with a "prime" is the image of the point without. that is, b' is the image of b.

here, there is no dilation or reflection. there is simply translation (with no direction shown). which figure you call the "preimage" and which one you call the "image" is up to you. as a matter of convention, the naming is as described above.