Question

me ajudam foto abaixo???

Answer 1

a

b = 3

c = 7

a = y

a² = b² + c²

y² = 3² + 7²

y² = 9 + 49

y² =58

Vy² = V58

y = V58

b

b = 3

c = x

a = 3V2

a² = b² + c²

(3V2)² = 3² + x²

( 9 * 2) = 9 + x²

18 = 9 + x²

18 - 9 = x2

x² = 9 ou 3²

Vx² = V3²

x = 3 *****

c

a = y + 6

b= 8

c =y

a² = b² + c²

( y + 6)² = 8² + y²

[(y)² + 2 * y * 6 + (6 )² ] = 64 + y²

y² + 12y + 36 = 64 + y²

y² - y² + 12y + 36 - 64 = 0

12y - 28 = 0

12y = 28

y = 28/12 =7/3 *** resposta

d

a = ( x + 2)

b = x

c = x + 1

a² = b² + c²

( x + 2)² = x² + ( x + 1)²

[(x)² + 2 * x * 2 + (2)²] = x² + [ (x)² + 2 * x * 1 + (1)²]

x² + 4x + 4 = x² + ( x² + 2x + 1 )

x² + 4x + 4 = 2x² + 2x + 1

x² - 2x² + 4x - 2x + 4 - 1 = 0

- x² + 2x + 3 = 0 ( - 1)

x² - 2x - 3 = 0

delta = (-2)² - [ 4 * 1 * (-3)] = 4 + 12 = 16 ou V16 = 4 ***

x = ( 2 + 4)/2

x = 6/2 = 3 ***

a = x + 2 = 3 + 2 = 5 ****

b = x = 3 ****resposta

c = x + 1 = 3 + 1 = 4 ****